Bais Yaakov of Spring Valley v. ACT, Inc. ( 2021 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 20-1537
    BAIS YAAKOV OF SPRING VALLEY,
    on behalf of itself and all others similarly situated,
    Plaintiff, Appellant,
    v.
    ACT, INC.,
    Defendant, Appellee.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Timothy S. Hillman, U.S. District Judge]
    Before
    Lynch, Kayatta, and Barron,
    Circuit Judges.
    Aytan Y. Bellin, with whom Bellin & Associates LLC was on
    brief, for appellant.
    Robert A. Burgoyne, with whom Perkins Coie LLP, Robert L.
    Leonard, and Doherty, Wallace, Pillsbury & Murphy, P.C., were on
    brief, for appellee.
    August 30, 2021
    KAYATTA, Circuit Judge.       ACT, Inc., is a non-profit
    entity that develops and administers the ACT college admissions
    test.   Bais Yaakov of Spring Valley is a small private high school
    to which ACT sent three one-page faxes in 2012.           Bais Yaakov has
    since pursued ACT with a zeal that would impress even Hugo's
    Inspector Javert.      On behalf of itself and a class of similarly
    situated recipients of faxes from ACT, Bais Yaakov alleges that
    the faxes were unsolicited advertisements sent in violation of the
    Telephone   Consumer   Protection   Act   of   1991   (TCPA),   
    47 U.S.C. § 227
    (b)(1)(C).   Bais Yaakov seeks injunctive relief and statutory
    damages in an amount ACT estimates to exceed $400,000,000.
    After almost eight years of litigation -- including an
    interlocutory appeal to this court, see Bais Yaakov of Spring
    Valley v. ACT, Inc., 
    798 F.3d 46
    , 46 (1st Cir. 2015) -- the district
    court entered judgment against Bais Yaakov.           It found that class
    certification was unwarranted and that Bais Yaakov's individual
    claim was rendered moot by ACT's offer to pay the full amount of
    that claim ($46,500) and its promise not to send further faxes to
    Bais Yaakov.   While we see no abuse of discretion in the denial of
    class certification, we vacate the judgment because Bais Yaakov's
    own claim for damages is not quite moot.        Our reasoning follows.
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    I.
    In 2005, Bais Yaakov filled out a High School Code
    Request Form, on which it provided its fax number.              Students use
    the High School Code number to have their ACT test scores reported
    to their high school.        On the form, Bais Yaakov checked a box
    indicating    that   it   wanted   to    administer   certain   standardized
    tests, that it wanted to receive its students' test scores, and
    that it wanted to receive SAT or ACT publications.
    Seven years later, ACT sent three faxes to Bais Yaakov
    over the course of three months.             The first fax was a one-page
    flyer stating in large bold letters, "Don't forget to register for
    the ACT!"      Underneath, the fax directed counseling staff to
    "[r]emind" students of the next ACT test date, which it featured
    prominently.     It listed the registration deadlines for the test
    date and advised that "[s]tudents can meet the . . . deadline by
    registering on-line" at a specified ACT web address.             In the top-
    left corner, the fax presented the name "ACT" above the words
    "advancing lives."
    The second fax was identical to the first but with a
    different test date and corresponding registration deadlines.
    The third fax contained what appears to be an image of
    a crowd cheering at a baseball game, with the words "Give Your
    Students the Home-Field Advantage" superimposed on one side and
    "ACT" on the other.       The bottom of the image stated, "Become an
    - 3 -
    ACT Test Center."        Beneath the image was more text, which said,
    among other things:       "By offering the ACT at your high school you
    provide your students with a competitive edge."; "Your school can
    benefit too.      Your school staff will be compensated for assuming
    the roles of test supervisor, room supervisors, and proctors.";
    and "The curriculum-based ACT is accepted by all 4-year colleges
    and universities in the U.S." (emphasis omitted).
    Bais Yaakov alleges that these three faxes are among
    over 28,000 unlawfully faxed advertisements ACT sent to over 7,000
    schools across the country between 2008 and 2012.
    II.
    A.
    The   TCPA    prohibits    sending    advertisements      to    fax
    machines, but with two principal exceptions:          An advertisement may
    be sent to a fax machine (1) if the person to whom it is sent has
    given "prior express invitation or permission, in writing or
    otherwise," 
    47 U.S.C. § 227
    (a)(5); or (2) if certain conditions
    are satisfied, one of which requires the inclusion of an opt-out
    notice on the fax, 
    id.
     § 227(b)(1)(C).          None of the faxes at issue
    in   this   appeal   contains   an    opt-out   notice,   so   any   that   are
    advertisements are unlawful if they were sent without prior express
    invitation or permission.
    By regulation, the Federal Communications Commission
    (FCC) promulgated a substantial further limitation on sending
    - 4 -
    advertisements by fax.      In its so-called Opt-Out Regulation (also
    referred to as the Solicited Fax Rule), the agency decreed that
    even faxes sent with prior express invitation or permission must
    contain an opt-out notice.      See Rules & Regulations Implementing
    the Telephone Consumer Protection Act of 1991; Junk Fax Prevention
    Act of 2005, 
    71 Fed. Reg. 25,967
    , 25,971-72 (May 3, 2006) (formerly
    codified at 
    47 C.F.R. § 64.1200
    (a)(4)(iv)); Bais Yaakov of Spring
    Valley v. FCC, 
    852 F.3d 1078
    , 1080 (D.C. Cir. 2017) (Kavanaugh,
    J.).   ACT included no opt-out notice in any of its faxes, so if
    the Opt-Out Regulation is valid, prior express invitation or
    permission would be no defense.        Instead, ACT's liability to any
    recipient    would   turn   entirely   on   whether   the   fax   was   an
    advertisement.
    The FCC defines the term "advertisement" for purposes of
    the TCPA as "any material advertising the commercial availability
    or quality of any property, goods, or services."              
    47 C.F.R. § 64.1200
    (f)(1); see also 
    47 U.S.C. § 227
    (a)(5) (using similar
    language to define the term "unsolicited advertisement").               To
    classify a communication as "advertising," the agency looks to the
    communication's "primary purpose."          In re Rules & Regulations
    Implementing the Telephone Consumer Protection Act of 1991, 31 FCC
    Rcd. 13,289, 13,291 (2016).
    - 5 -
    B.
    Bais Yaakov proposed two alternative classes, labeled
    Class A and Class B.   With Class A, Bais Yaakov sought to include
    only recipients of "unsolicited" fax "advertisements" from ACT
    containing no opt-out notice.   With Class B, Bais Yaakov sought to
    take advantage of the Opt-Out Regulation by broadening the class
    to include recipients of any (even solicited) fax advertisements
    from ACT that did not contain an opt-out notice as required by the
    regulation.
    With the parties' consent, the district court considered
    first whether the Opt-Out Regulation was valid.      In finding the
    regulation to be invalid, the district court deemed binding a
    decision to that effect by the Court of Appeals for the D.C.
    Circuit.   See Bais Yaakov of Spring Valley v. ACT, Inc., 
    328 F.R.D. 6
    , 10 (D. Mass. 2018) (citing Bais Yaakov, 852 F.3d at 1083).1
    Having eliminated the Opt-Out Regulation as a tool for
    establishing that every fax sent by ACT necessarily violated the
    TCPA because ACT never included opt-out notices, the district court
    turned its attention to the two issues raised by the TCPA's
    1  Following the D.C. Circuit's ruling in Bais Yaakov, the
    FCC eventually repealed the Opt-Out Regulation. See In re Rules
    & Regulations Implementing the Telephone Consumer Protection Act
    of 1991 Junk Fax Prevention Act of 2005 Petitions for
    Reconsideration &/or Declaratory Ruling & Retroactive Waiver of 
    47 C.F.R. § 64.1200
    (a)(4)(iv) Regarding the Commission's Opt-Out
    Notice Requirement for Faxes Sent with the Recipient's Prior
    Express Permission, 35 FCC Rcd. 3079 (2020).
    - 6 -
    exceptions from its prohibition on advertisements:      Did the fax
    contain an advertisement?   And, if so, was it unsolicited (i.e.,
    sent without prior express invitation or permission)?   As to these
    two issues, the district court took the standard Rule 23 approach:
    It did not try to resolve the issues; rather, it properly tried to
    decide whether Bais Yaakov had shown that resolution of the issues
    could be accomplished on a common, class-wide basis.      See Amgen
    Inc. v. Conn. Ret. Plans & Tr. Funds, 
    568 U.S. 455
    , 459–60 (2013)
    ("[T]he office of a Rule 23(b)(3) certification ruling is not to
    adjudicate the case; rather it is to select the 'metho[d]' best
    suited to adjudication of the controversy fairly and efficiently."
    (second alteration in original)).
    Looking first at the request to certify Class B, the
    district court found that the invalidity of the Opt-Out Regulation
    permitted a defense based on prior express permission.     Assaying
    the record, it then concluded that the need to adjudicate such a
    defense would require an examination of the circumstances of each
    class member and its communications with ACT to determine whether
    that class member gave the requisite permission.   And the need to
    engage in such an individual inquiry meant that common issues would
    not predominate as required in order to certify a class under
    Rule 23(b)(3).   See In re Asacol Antitrust Litig., 
    907 F.3d 42
    ,
    51–52 (1st Cir. 2018).
    - 7 -
    With proposed Class A, Bais Yaakov sought to eliminate
    this diversity among class members by limiting that class to
    recipients of unsolicited faxes.            The district court rejected this
    attempt, finding that such a class would constitute a "fail-safe
    class," i.e., a class that would bind class members only if they
    won.   See In re Nexium Antitrust Litig., 
    777 F.3d 9
    , 22 & n.19
    (1st Cir. 2015).          The district court then reasoned that if the
    class were redefined to include recipients of any faxes from ACT,
    it would suffer from the same defects as did Class B.
    Having denied class certification, the district court
    turned to Bais Yaakov's individual claim, on which the parties had
    cross-moved for summary judgment. See Bais Yaakov of Spring Valley
    v. ACT, Inc., 
    438 F. Supp. 3d 106
    , 108 (D. Mass. 2020).                           The
    district    court    found   that     genuine     disputes     of    material     fact
    -- namely, whether the three faxes identified by Bais Yaakov
    qualified as advertisements and whether Bais Yaakov gave the
    requisite permission -- precluded granting summary judgment for
    either party.       
    Id.
     at 109–10.
    Later, ACT moved to dismiss Bais Yaakov's claim as moot.
    According    to     the    district      court,    by   that        point   ACT    had
    "unconditionally      tendered      to    [Bais   Yaakov]    all     the    statutory
    damages that it [sought] on an individual basis."                    Bais Yaakov of
    Spring Valley v. ACT, Inc., 
    461 F. Supp. 3d 3
    , 5 (D. Mass. 2020).
    As to injunctive relief, ACT had not sent Bais Yaakov a fax since
    - 8 -
    2012, and it had agreed not to send any faxes in the future in
    violation of the TCPA.         
    Id.
     at 4–5.     The district court therefore
    found the case moot and dismissed it.           
    Id. at 5
    .
    Bais Yaakov now appeals three rulings of the district
    court:      the holding that the Opt-Out Regulation is invalid, the
    denial of class certification, and the dismissal of Bais Yaakov's
    individual claim as moot.        Bais Yaakov also asks us to review the
    district court's denial of its motion for summary judgment, but
    "[i]t is settled beyond peradventure that we lack jurisdiction to
    hear appeals from the routine denial of summary judgment motions
    on the merits."         Morse v. Cloutier, 
    869 F.3d 16
    , 31 (1st Cir.
    2017).
    III.
    We    consider   first     the   validity     of   the   Opt-Out
    Regulation.        The parties argue at length over whether the decision
    of the D.C. Circuit finding the regulation invalid binds this
    court.      We sidestep that issue because we find the D.C. Circuit's
    decision -- whether binding or not -- correct, largely for the
    reasons cogently set forth in that opinion.           See Bais Yaakov, 852
    F.3d   at    1081–83;    see   also    Physicians   Healthsource,      Inc.   v.
    Cephalon, Inc., 
    954 F.3d 615
    , 624 n.11 (3d Cir. 2020) (declining
    to decide whether Bais Yaakov was binding on other circuits because
    it agreed with the D.C. Circuit's reasoning); Sandusky Wellness
    Ctr., LLC v. ASD Specialty Healthcare, Inc., 
    863 F.3d 460
    , 467 &
    - 9 -
    n.1 (6th Cir. 2017) (treating the D.C. Circuit's ruling as binding
    and separately agreeing with its reasoning); Nack v. Walburg, 
    715 F.3d 680
    , 682 (8th Cir. 2013) (noting that the FCC's authority to
    promulgate the Opt-Out Regulation was "questionable").
    When a court reviews an agency's construction of a
    statute the agency administers, it conducts the familiar Chevron
    two-step analysis:
    First, always, is the question whether
    Congress has directly spoken to the precise
    question at issue. If the intent of Congress
    is clear, that is the end of the matter; for
    the court, as well as the agency, must give
    effect to the unambiguously expressed intent
    of Congress. . . . [I]f the statute is silent
    or ambiguous with respect to the specific
    issue, the question for the court is whether
    the agency's answer is based on a permissible
    construction of the statute.
    Chevron U.S.A. Inc. v. Nat. Res. Def. Council, Inc., 
    467 U.S. 837
    ,
    842–43 (1984) (footnote omitted). In Bais Yaakov, the D.C. Circuit
    stopped after the first step.          852 F.3d at 1082.            It held that
    Congress    had   spoken    directly      about     whether     solicited         fax
    advertisements       required   opt-out     notices   (giving        the   FCC     no
    authority to issue a regulation on the matter), because the text
    of   the   statute    explicitly   required       opt-out    notices       only    on
    unsolicited fax advertisements and said nothing about requiring
    such notices on solicited fax advertisements.               See id.; 
    47 U.S.C. § 227
    (b)(2)(C)(iii)      (prohibiting     the     sending     via    fax   of     "an
    unsolicited    advertisement,      unless    [among    other        things,]      the
    - 10 -
    unsolicited   advertisement      contains   a   notice   meeting    the
    requirements under" another provision of the statute).
    This reasoning makes good sense.     The Supreme Court has
    directed   courts   to   apply   "traditional   tools    of   statutory
    construction" in determining Congress's intent, Chevron, 
    467 U.S. at
    843 n.9, and it is a "settled rule that [courts] must, if
    possible, construe a statute to give every word some operative
    effect," Cooper Indus., Inc. v. Aviall Servs., Inc., 
    543 U.S. 157
    ,
    167 (2004).   Moreover, in another subsection of the TCPA, Congress
    placed requirements not just on unsolicited fax advertisements but
    on "any communication" or "any message" sent via fax, 
    47 U.S.C. § 227
    (d)(1)(A), (B), demonstrating that when Congress wanted to
    regulate faxes broadly, it used broad language to do so.            See
    Barnhart v. Sigmon Coal Co., 
    534 U.S. 438
    , 452 (2002) (explaining
    the "general principle of statutory construction" that courts
    presume Congress has acted "intentionally and purposely" when it
    "includes particular language in one section of a statute but omits
    it in another section of the same Act" (quoting Russello v. United
    States, 
    464 U.S. 16
    , 23 (1983))).    To read the statute as requiring
    opt-out notices on solicited advertisements would be to remove the
    word "unsolicited" from the provision discussing opt-out notices
    or to ink in new provisions discussing solicited faxes.
    The panel dissent from the D.C. Circuit's opinion in
    Bais Yaakov criticized the majority for "fail[ing] to see the FCC's
    - 11 -
    rationale for requiring that all fax ads include an informative
    opt-out     notice,"       which      the   agency         had     justified       as     an
    interpretation of what it means for a fax to be sent with "prior
    express invitation or permission" and therefore "solicited."                             852
    F.3d at 1083-84 (Pillard, J., dissenting).                  But, assuming that the
    FCC might justifiably conclude that a fax is not solicited within
    the meaning of the TCPA if the immediately preceding fax did not
    include    an    opt-out    mechanism,      we   do   not        see   how   the    agency
    reasonably       could   have      concluded     that       a     particular       fax    is
    unsolicited unless it itself contains an opt-out notice.                                 And,
    even if the presence of an opt-out notice bears on whether the
    subsequently received fax is solicited, the first fax received
    after     the    recipient      provides    express         permission       cannot       be
    considered unsolicited under any plausible construction of the
    term.     Thus, as the FCC's rule applied to every fax sent, it
    required an opt-out notice on at least some faxes that were
    indisputably       solicited          and   cannot         be     sustained        as     an
    interpretation of what "solicited" means.                       Nor is it our role to
    rewrite the regulation, even if one assumes that some alternative
    version might suffice.
    Bais Yaakov argues, however, that our precedent compels
    a different understanding of whether the FCC has authority to
    require opt-out notices on solicited fax advertisements.                                  It
    attempts    to    analogize      to    Alexander      v.    Treasurers       of     Boston
    - 12 -
    University, 
    766 F.2d 630
     (1st Cir. 1985), a case concerning the
    so-called Solomon Amendment, which denied federal financial aid to
    students who were required to register for the military draft but
    failed to do so.      
    Id. at 632
    .       To implement the Amendment, the
    Secretary of Education obviously needed to know whether each
    financial aid applicant was required to register for the draft
    and, if so, whether the applicant had in fact registered.               So the
    Secretary   simply   required    each    applicant    as   a    condition   of
    receiving aid to certify either that he or she was registered or
    was not required to register.           
    Id.
     at 632–33.         We found that
    requiring applicants for aid to indicate that they were eligible
    for that aid, with a "minimum of fuss and inconvenience," 
    id. at 638
    ,   to   be   within   the   Secretary's   authority        to   promulgate
    regulations so as to do the job Congress assigned it.                   "[T]he
    Secretary is simply saying that if an individual is unwilling to
    tell the government that he or she fulfills the conditions for
    aid, the government will not dispense it."           
    Id. at 639
    .
    The analogy to Alexander is unpersuasive.               There, as
    explained, we concluded that, where the Secretary was uncertain
    whether a particular aid applicant was within the category of
    people who might be denied aid under the statute, it could impose
    a burden on that individual in the name of determining whether he
    or she was in fact within that regulable category.                  Here, Bais
    Yaakov asks us to hold something very different:               that an agency
    - 13 -
    can regulate a particular type of fax that it knows with certainty
    is necessarily beyond its regulatory authority -- specifically, a
    first fax that is plainly a solicited one -- in order to determine
    whether a subsequently received fax does fall within the scope of
    its authority.      Bais Yaakov has not explained why we can or should
    extend Alexander in that way.                As such, the Opt-Out Regulation
    finds no haven in Alexander. See Ragsdale v. Wolverine World Wide,
    Inc., 
    535 U.S. 81
    , 91-92 (2002).
    IV.
    A.
    We turn our attention next to Bais Yaakov's appeal of
    the   district     court's    order    denying         class    certification.     In
    briefing    that    challenge,        the        parties      sensibly   train   their
    arguments on the requirements of Rule 23(b)(3) of the Federal Rules
    of Civil Procedure, which states in pertinent part as follows:                      "A
    class action may be maintained if . . . the court finds that the
    questions of law or fact common to class members predominate over
    any questions affecting only individual members, and that a class
    action is superior to other available methods for fairly and
    efficiently adjudicating the controversy."
    In practice, litigation over these requirements often
    reduces    itself    to   a    contest           in   which     the   party   opposing
    certification points to issues that it claims will need to be
    decided separately for many class members.                     In turn, the putative
    - 14 -
    class representative tries to carry the burden of convincing the
    court    either   that   prevailing   on   any   of   those   issues   is   not
    important to obtaining the remedy sought, that the issues can be
    adjudicated in a manner that produces a common answer for all class
    members, or that, to the extent individual issues remain, they can
    be resolved in a manner that is both practicable and protective of
    the parties' rights.      See Asacol, 907 F.3d at 51 ("The aim of the
    predominance inquiry is to test whether any dissimilarity among
    the claims of class members can be dealt with in a manner that is
    not 'inefficient or unfair.'" (quoting Amgen, Inc., 
    568 U.S. at 469
    )).    "Inefficiency can be pictured as a line of thousands of
    class members waiting their turn to offer testimony and evidence
    on individual issues."      
    Id.
       "Unfairness is equally well pictured
    as an attempt to eliminate inefficiency by presuming to do away
    with the rights a party would customarily have to raise plausible
    individual challenges on those issues."          
    Id.
     at 51–52.
    True to form, ACT points to five issues allegedly central
    to the relief sought that ACT claims cannot be resolved fairly
    without an unmanageable need to consider the varying circumstances
    of individual class members. These issues are: (1) Did the school
    actually receive a fax from ACT? (2) Which fax did it receive?
    (3) Was the fax an advertisement when viewed in the circumstances
    of that recipient? (4) Does that school have the capacity to sue
    or belong to a class? and (5) Did the recipient of the fax
    - 15 -
    advertisement provide prior express permission for ACT to send the
    advertisement by fax?
    The district court sidestepped the first four of these
    issues, training its attention on the fifth, the question of
    permission:     Did a recipient of a faxed advertisement give ACT
    prior express permission to send the advertisement by fax?   Under
    Class A, this issue must be resolved to determine even if someone
    is a class member (i.e., received an "unsolicited" fax).     Under
    Class B, this issue must be resolved to determine whether ACT has
    a defense on the merits (i.e., that it received prior express
    permission to send the fax).    
    47 U.S.C. § 227
    (a)(5), (b)(1)(C).
    In either instance, the pivotal Rule 23 question is whether the
    record reasonably shows that some putative class members may have
    permitted ACT to send by fax what ACT faxed them and, if so,
    whether there is a fair and efficient method for culling those
    consenting recipients from the class.    The district court found
    that ACT presented sufficient evidence that the class likely
    included members who invited ACT to send any materials by fax, and
    that to identify those members the court would have to "parse
    through each unique relationship" between every class member and
    ACT; hence, certification of Class B was precluded for lack of
    predominance.
    As to Class A, the district court found that limiting
    the definition of class members to those who received "unsolicited"
    - 16 -
    faxes    created      a   prohibited      "fail-safe       class,"        Messner     v.
    Northshore Univ. HealthSystem, 
    669 F.3d 802
    , 825 (7th Cir. 2012),
    and that, in any event, no jiggering with the class definition
    would eliminate the need to decide the issue of permission (or
    solicitation) for each putative class member.                  We now review that
    decision,     reversing     only   if    we    find   an   abuse     of    discretion
    (including any error of law).            Asacol, 907 F.3d at 51.
    B.
    In deciding whether individual issues predominate over
    common questions, a court must not rely on mere speculation that
    individual issues may arise.             See Waste Mgmt. Holdings, Inc. v.
    Mowbray, 
    208 F.3d 288
    , 298 (1st Cir. 2000); Bridging Cmtys. Inc.
    v. Top Flite Fin. Inc., 
    843 F.3d 1119
    , 1125 (6th Cir. 2016)
    (concluding that the district court abused its discretion in
    finding that issues of consent predominated where the defendant
    "did    not   offer   any   information        or   evidence    to   support        that
    theory").     Rather, it should consider only those issues that would
    likely arise if an individual class member's claims were being
    adjudicated on the merits.         See Mowbray, 208 F.3d at 298; Madison
    v. Chalmette Ref., L.L.C., 
    637 F.3d 551
    , 555 (5th Cir. 2011).                         In
    so doing, a court considers "the probable course of the litigation"
    so as to "formulate some prediction as to how specific issues will
    play out in order to determine whether common or individual issues
    predominate."      Mowbray, 208 F.3d at 298.               Even then, "the mere
    - 17 -
    fact that . . . concerns may arise and may affect different class
    members differently does not compel a finding that individual
    issues predominate over common ones."            Id. at 296.      To the
    contrary,   "we have recognized that a class may be certified
    notwithstanding the need to adjudicate individual issues so long
    as   the   proposed   adjudication   will   be   both   'administratively
    feasible' and 'protective of defendants' Seventh Amendment and due
    process rights.'"      Asacol, 907 F.3d at 52 (quoting Nexium, 777
    F.3d at 19).      So, here,    we ask whether there is more than
    speculation that individual issues of permission may arise and, if
    so, whether Bais Yaakov has shown that those who gave ACT prior
    express permission to send advertisements can be culled from the
    class in a way that is administratively feasible and protective of
    ACT's due process rights.
    We start with the fact that some unknown number of the
    putative class members sent a form to ACT providing a fax number
    and requesting that ACT send them ACT "publications."             Indeed,
    Bais Yaakov itself both sent such a request and claims to be a
    typical member of the classes it seeks to represent.          See Fed. R.
    Civ. P. 23(a)(3).     Further, according to the declaration of an ACT
    official, class members routinely provided ACT with their fax
    number when inquiring about becoming a test center, requesting a
    High School Code number, seeking information about the dates the
    test will be administered, or asking for copies of publications.
    - 18 -
    At least two of the three faxed documents to which Bais Yaakov
    points as advertisements are notices of the exam dates and sign-
    up deadlines -- i.e., just the sort of information that a school
    asking for ACT publications would likely expect to receive by way
    of the fax number it supplied when asking for the documents.                        The
    third document, in turn, concerned the opportunity to administer
    ACT exams.       And because the typical class member (e.g., Bais
    Yaakov) registered interest in giving such exams, one can easily
    see how a request by that school to receive ACT publications would
    cover such a document.
    Nevertheless,      as    Bais    Yaakov    points      out,   the    TCPA
    requires      "express    permission."           "Express      permission"        means
    "[p]ermission that is clearly and unmistakably granted by actions
    or words, oral or written."             Permission, Black's Law Dictionary
    (11th   ed.    2019);     cf.    id.   (defining      "implied       permission"    as
    "permission that is inferred from words or actions"). Furthermore,
    FCC rules (unchallenged by either side) provide that in gauging
    whether    express       permission      was    provided,      we     consider     the
    understanding     of     the    recipient.       In     re   Rules    &   Regulations
    Implementing the Telephone Consumer Protection Act of 1991, 18 FCC
    Rcd. 14,014, 14,129 (2003) ("Express permission to receive a faxed
    ad requires that the consumer understand that by providing a fax
    number, he or she is agreeing to receive faxed advertisements.").
    So we do not reject the possibility that, notwithstanding the
    - 19 -
    strong inference to be drawn from supplying a fax number while
    requesting a publication, any given school may not have understood
    its communications to invite ACT to send by fax that which it sent.
    There is evidence, furthermore, that Bais Yaakov itself did not
    understand    its    request     for   publications    to   convey   perpetual
    permission for ACT to send Bais Yaakov any advertisements.                After
    all, Bais Yaakov objected when it received the faxed publications
    from ACT.     And Bais Yaakov had no longstanding relationship with
    ACT that might have lent further support to the notion that it
    received by fax what it clearly asked to receive by fax.               To the
    contrary, the record as described by the parties paints a picture
    of faxes sent to Bais Yaakov out-of-the-blue after years of no
    contact.
    There is evidence, though, that other members of the
    putative     class    did   not    share    Bais   Yaakov's     understanding
    concerning     the     express     requests     that    they    receive    ACT
    publications.       Indeed, ACT presented concrete examples of schools
    that did not share Bais Yaakov's understanding.                These examples
    took the form of declarations from representatives of seventy-
    eight schools with whom ACT corresponded. The declarants confirmed
    that their schools provided ACT with fax numbers, and that they
    frequently requested and received publications from ACT by fax.
    When shown the three faxed ACT publications alleged by Bais Yaakov
    to be advertisements, they replied that the information contained
    - 20 -
    in   the   publications   was   "integral      to"    the    school's    ongoing
    interactions with ACT, and that "ACT would have had permission
    from the declarant or other school personnel" to send "these types
    of   informational    communications    using        any    available    type   of
    communication, including facsimile."
    Bais Yaakov makes no argument that the concrete examples
    offered by ACT did not exemplify a larger subset of similar class
    members that could only be identified were one to parse through
    the circumstances of each school in the putative class.                  The fact
    that many schools expressly asked when giving their fax numbers to
    receive ACT publications likely suggests why Bais Yaakov makes no
    argument that ACT's examples constitute just "a few unusual class
    members, who can be picked off by the defendant."                   Asacol, 907
    F.3d at 57 (citing Halliburton v. Erica P. Jong Fund, Inc., 
    573 U.S. 258
    , 276 (2014).
    Rather,   Bais   Yaakov   argues    that       ACT   would   have   no
    plausible defense of consent even in the circumstances presented
    by the proffered examples.      To support that argument, Bais Yaakov
    points out that the key sentence concerning permission to send the
    faxes employs the conditional "would have" formulation, rather
    than stating that ACT did in fact have permission to send the type
    of information contained in the faxes appended to the complaint.
    Certainly the syntax could have been clearer.               But given the prior
    communication providing a fax number and asking to receive ACT
    - 21 -
    publications, we think that a factfinder could reasonably read the
    declarations as reflecting a lack of memory about whether the faxes
    were received, not a doubt about whether they were invited if
    received.     A prior paragraph in each declaration explains that
    the declarant has been told that ACT might have sent to the
    recipient the three faxes appended to Bais Yaakov's complaint.
    Rather than claiming a rather remarkable memory about exactly what
    was received years ago, each declarant simply points to the faxes
    appended to Bais Yaakov's complaint and confirms that those faxes
    were the type of publications the school was requesting to receive
    by fax, and that ACT "would have had permission" to send them.         In
    short, a factfinder could reasonably read the declarations as
    conveying the point that "I do not recall if ACT sent these
    specific faxes, but if it did, it would have had my permission to
    do so."
    Bais Yaakov argues that the Seventh Circuit concluded
    otherwise   in   construing   a    recipient's   declaration   that   the
    recipient "would have given" consent.        Physicians Healthsource,
    Inc. v. A-S Medication Sols., LLC, 
    950 F.3d 959
    , 966 (7th Cir.
    2020) (emphasis omitted).         In so holding, it appears that the
    Seventh Circuit read the condition implied by that statement as
    "if asked, I would have given consent (but I was never asked)."
    While it may have been reasonable in the context of that case to
    read the statements as indicating that the recipients never gave
    - 22 -
    permission at all, here the context for at least some class members
    is markedly different.
    Many   schools    were    obviously   trying    to   assist    their
    students in taking the ACT test and, in many cases, in serving as
    test centers.       As the schools' representatives explain, they
    therefore wanted information about "the nature of the test, how
    scores are used, how students can prepare for the test, test
    registration deadlines, and related topics."             In this context, a
    factfinder could determine that the request for ACT "publications"
    was clearly understood by the school to be a request for notice of
    exam dates, deadlines for sign-ups, and -- in the case of test
    centers -- opportunities to give exams.            This possibility finds
    reinforcement in some instances where a school, unlike Bais Yaakov,
    repeatedly requested information year in and year out.                 As best
    the parties' briefs reveal, Bais Yaakov was the only one of out of
    thousands of recipients that complained about receiving faxes from
    ACT.   Silence is not express permission.               But widespread and
    prolonged   silence   of     this    type   strongly   suggests     that   other
    recipients were more like ACT's examples than they were like Bais
    Yaakov.
    Bais   Yaakov    points     out   (correctly)    that    the   TCPA
    requires permission to send advertisements, not just faxes.                   To
    leverage that point, Bais Yaakov argues that the three subject
    faxes were advertisements.          The declarations, though, deflect the
    - 23 -
    thrust of this argument because they expressly refer to the
    specific documents appended to the complaint.                 In short, even if
    we assume that these documents are advertisements, ACT would not
    incur liability if in the context of a particular relationship a
    request    for    ACT   publications      was     clearly    understood       as   an
    invitation to fax what was faxed.                 See Gorss Motels, Inc. v.
    Safemark Sys., LP, 
    931 F.3d 1094
    , 1100 (11th Cir. 2019) ("Although
    express    permission      requires      a    'clear[]      and        unmistakabl[e]
    communicat[ion],' it does not require that a recipient state
    specifically that his permission includes faxed advertisements.").
    On this record, we see no abuse of discretion in the
    district court's finding that there were, among the thousands of
    yet-to-be-canvassed putative class members, schools that could be
    found by the factfinder to have given the requisite permission.
    So that left a problem:        How could one identify and cull out those
    who did give express permission to send what was sent?
    Bais Yaakov has made no argument that the court could
    cull from the class the consenting schools in an administratively
    feasible   way,     protective    of    ACT's    rights.      Compare        Sandusky
    Wellness   Ctr.,     863   F.3d   at    469     ("Identifying          solicited   fax
    recipients       through   a   form-by-form        inquiry        is     sufficiently
    individualized to preclude class certification."), with Smilow v.
    Sw. Bell Mobile Sys., Inc., 
    323 F.3d 32
    , 40 (1st Cir. 2003)
    ("Common      issues       predominate          where    individual           factual
    - 24 -
    determinations      can   be    accomplished    using     computer    records,
    clerical assistance, and objective criteria -- thus rendering
    unnecessary an evidentiary hearing on each claim.").            The district
    court therefore reasonably determined that individual issues of
    permission    would   predominate     over   common      questions    for   both
    Class A and Class B.       See Asacol, 907 F.3d at 51 (explaining that
    review of class-certification decision for abuse of discretion
    involves clear-error review of "'fact-dominated' issues" (quoting
    In re New Motor Vehicles Canadian Exp. Antitrust Litig., 
    522 F.3d 6
    , 17 (1st Cir. 2008))); Díaz-Alarcón v. Flández-Marcel, 
    944 F.3d 303
    , 312 (1st Cir. 2019) (explaining that a "judge's choice between
    competing,    but   rational,     views    cannot   be   clearly     erroneous"
    (citing Anderson v. City of Bessemer City, 
    470 U.S. 564
    , 573–74
    (1985))).2
    C.
    Bais Yaakov       has asked that, were we to affirm the
    district court's denial of class certification, we should direct
    the district court to consider revising the class definitions as
    Bais Yaakov now proposes.         As we have explained, Bais Yaakov had,
    in pertinent part, defined Class B as consisting of those whom ACT
    sent "a facsimile advertisement" and Class A as consisting of those
    2  We need not reach the question of whether Class A as
    defined initially by Bais Yaakov would nevertheless be rejected as
    a fail-safe class were there otherwise no predominance problem.
    - 25 -
    whom ACT sent "an unsolicited facsimile advertisement."                 In a
    footnote on the last page of Bais Yaakov's reply memorandum in
    support of its motion for class certification before the district
    court, Bais Yaakov suggested that, if necessary, the district court
    could narrow Class B to consist of those whom ACT sent "a facsimile
    whose content was identical or substantially similar to the content
    of any of the [three] facsimiles" Bais Yaakov says it received and
    that the district court could narrow Class A the same way but
    concerning an "unsolicited facsimile." Neither below nor on appeal
    has Bais Yaakov explained how these alternative definitions might
    cure the problems we have just discussed.          Indeed, our discussion
    effectively assumed -- favorably to Bais Yaakov -- that each
    putative class member received those three documents from ACT via
    fax.    In short, the proposed amendment would not eliminate the
    need to resolve individual issues of permission.
    To summarize:       The typical school sent ACT a form
    providing the school’s fax number and expressly asking to be sent
    ACT publications.      The documents ACT then sent in return to the
    supplied fax number appear on their face to provide just the sort
    of information that a school would want to receive after requesting
    ACT    publications.    These   common     facts   raise   quite   a   strong
    inference that the school sending such a form understood its
    request as inviting ACT to fax the documents that it faxed.             After
    all, why supply the fax number and request ACT publications if not
    - 26 -
    to receive the publications by fax?         Bais Yaakov does have a point
    in arguing that its own circumstances may be found to belie any
    inference that it had any such understanding.                   The faxes it
    received were sent seven years later, and it promptly objected.
    But   the    evidence     submitted   by    ACT    makes     clear   that    the
    circumstances of at least some other schools was to the contrary,
    actually reinforcing the strong inference that the forms sent to
    ACT were clearly understood and intended to be read as invites to
    send by fax that which was faxed.             Whether that is so in any
    individual case may be a close question which we need not resolve.
    We hold simply that it is a genuine question that may well be
    answered one way or the other for any given school, and beyond
    arguing on the merits that no school gave permission to fax the
    documents -- an argument we have now rejected -- Bais Yaakov offers
    no means by which to answer that crucial question on a common
    basis.    Hence, the district court did not abuse its discretion in
    finding that the proposed classes could not be certified.
    V.
    We consider, finally, Bais Yaakov's appeal from the
    dismissal of its own individual claim as moot.             After denying Bais
    Yaakov's motion to proceed as a class action, the district court
    turned to the merits of the case, eventually denying in pertinent
    part contending motions for summary judgment on the questions of
    whether     the   three    faxes   appended       to   the    complaint     were
    - 27 -
    advertisements and whether Bais Yaakov had permitted ACT to send
    them by fax.    ACT thereupon sent Bais Yaakov a check in the amount
    of $45,600, which Bais Yaakov does not dispute is the most that it
    can recover in this lawsuit.     In a letter accompanying the check,
    ACT also promised to honor the check no matter the outcome of the
    case, and it offered to deposit the check with the district court,
    to be held until any appeal is completed and final judgment
    entered.3     ACT also promised not to send Bais Yaakov any further
    faxes "that violate the TCPA," upon pain of paying "$1,500 should
    it send any such fax."    The record also reflects that ACT has sent
    no faxes of any type to Bais Yaakov since 2012.
    Bais Yaakov rejected the check and the accompanying
    promises.     Unimpressed, the district court concluded that Bais
    Yaakov had received all that it could possibly receive as damages,
    and that it had no basis to obtain injunctive relief because "the
    allegedly wrongful behavior could not reasonably be expected to
    recur."     Bais Yaakov, 461 F. Supp. 3d at 4 (quoting Am. C.L. Union
    of Mass. v. U.S. Conf. of Cath. Bishops, 
    705 F.3d 44
    , 55 (1st Cir.
    2013)).
    3  The letter stated, "In all events, ACT hereby commits to
    paying $45,600 to Bais Yaakov, by way of the payment tendered with
    this letter or through other means as necessary at the conclusion
    of this litigation." It also stated that "this tendered payment
    is unconditional and irrevocable."
    - 28 -
    In    this    very   lawsuit,     we   previously   considered   and
    rejected a prior attempt by ACT to moot the litigation by tendering
    an offer of judgment under Rule 68 of the Federal Rules of Civil
    Procedure.        See Bais Yaakov of Spring Valley v. ACT, 
    798 F.3d 46
    (1st Cir. 2015).       In so doing we expressed concern about the threat
    to meritorious class actions posed by sanctioning efforts to cut
    off Rule 23 certification by mooting the individual claims of the
    named plaintiff.          
    Id.
     at 48–49.   Nevertheless, we also recognized
    uncertainty regarding the weight attributed by the Supreme Court
    to such a concern.         Compare Deposit Guar. Nat'l Bank v. Roper, 
    445 U.S. 326
    , 339 (1980) ("Requiring multiple plaintiffs to bring
    separate actions, which effectively could be 'picked off' by a
    defendant's tender of judgment before an affirmative ruling on
    class certification could be obtained, obviously would frustrate
    the objectives of class actions."), with Genesis Healthcare Corp.
    v. Symczyk, 
    569 U.S. 66
    , 78 (2013) (describing that line from Roper
    as dicta and explaining that Roper's holding turned on the named
    plaintiff "possess[ing] an ongoing, personal economic stake in the
    substantive controversy –– namely, to shift a portion of attorney's
    fees   and   expenses       to    successful    class   litigants").     So    we
    ultimately based our rejection of the Rule 68 pick-off gambit on
    a prediction that the Supreme Court would find that a rejected
    Rule 68 offer provides no actual relief.                 See Bais Yaakov, 798
    F.3d at 52.
    - 29 -
    The   Supreme    Court      has    since    held     just    that:    "An
    unaccepted settlement offer -- like any unaccepted contract offer
    -- is a legal nullity, with no operative effect."                  Campbell-Ewald
    Co. v. Gomez, 
    577 U.S. 153
    , 162 (2016) (quoting Genesis Healthcare,
    
    569 U.S. at 81
     (Kagan, J., dissenting)).                So the question before
    us is whether there is good reason to reach a different result
    when a check, rather than a Rule 68 offer, is tendered.
    The precedent is admittedly uncertain and sparse on this
    subject.    After all, not many plaintiffs walk away from an offer
    to pay 100% of what they seek.          Nevertheless, there are reasons to
    conclude that ACT's tender of a check and associated promises did
    not moot Bais Yaakov's claims.             Bais Yaakov's self-interest in
    appealing the denial of class certification might have been reason
    enough depending on how well Roper stands up in light of Genesis,
    see    Campbell-Ewald,     577   U.S.    at    165     ("While    a     class    lacks
    independent       status    until       certified,        a      would-be        class
    representative with a live claim of her own must be accorded a
    fair    opportunity   to    show    that      certification       is    warranted."
    (citation omitted)), though we have now concluded the district
    court did not err in denying class certification.                     In any event,
    as Justice Thomas pointed out, at common law unconditionally
    offering funds while still denying liability is not a tender that
    requires the end of a lawsuit.                 Id. at 170-71 (Thomas, J.,
    concurring in the judgment).         Most narrowly, the transmittal of an
    - 30 -
    ordinary check does not differ for present purposes from an offer
    to pay:   The recipient has a promise, but no funds.   As the ancient
    proverb goes, "[t]here's many a slip 'twixt the cup and lip."      4
    The Greek Anthology 21 (W.R. Paton trans., 1918). Indeed, the
    Rule 68 offer at least conveys the ability to obtain a judgment,
    while the check conveys only a hope that the bank account will
    have the promised funds.      Cf. id. at 166 (majority opinion)
    (reserving judgment on whether a deposit of funds with the court
    and entry of judgment in the amount of those funds would moot the
    case); id. at 186 & n.2 (Alito, J., dissenting).4      So, as best we
    can tell, Bais Yaakov's damage claim is not moot.
    Finally, there is Bais Yaakov's request for injunctive
    relief.   We find no error in the district court's finding that
    ACT's cessation of sending faxes to Bais Yaakov since 2012, its
    deletion of Bais Yaakov's fax number from ACT's database, and its
    admission that any further faxing to ACT would render ACT liable,
    all combine to establish that ACT's allegedly wrongful behavior as
    to Bais Yaakov "could not reasonably be expected to recur."      Bais
    4  Compare Chen v. Allstate Ins. Co., 
    819 F.3d 1136
    , 1144–46
    (9th Cir. 2016) (reasoning that the defendant's deposit of the
    full amount of plaintiff's claims in an escrow account did not
    moot the plaintiff's claim since the plaintiff had not "actually
    or constructively received" the money), with Leyse v. Lifetime
    Ent. Servs., LLC, 
    679 F. App'x 44
    , 48 & n.2 (2d Cir. 2017) (summary
    order) (concluding that the district court properly entered
    judgment on the plaintiff's individual claim where the defendant
    deposited the full amount recoverable by the plaintiff with the
    clerk of court).
    - 31 -
    Yaakov, 461 F. Supp. 3d at 4 (quoting Am. C.L. Union of Mass., 705
    F.3d at 55).
    Bais Yaakov makes no other argument that its individual
    claim for injunctive relief should survive if we both affirm the
    denial of class certification and find no error in the district
    court's finding that Bais Yaakov cannot reasonably be expected to
    receive any more faxes from ACT after eight years of silence and
    the express assurances tendered.
    VI.
    For   the   foregoing    reasons,   we   affirm   the   district
    court's denial of class certification and its dismissal of the
    claim for injunctive relief.      We otherwise vacate the judgment and
    remand for further proceedings.
    - Concurring Opinion Follows -
    - 32 -
    BARRON, Circuit Judge, concurring.              This case raises a
    question like the one that we confronted in In Re Asacol Antitrust
    Litig., 
    907 F.3d 42
     (1st Cir. 2018):                Does Federal Rule of Civil
    Procedure 23's predominance requirement permit certification of a
    class whose members could prove their claim -- at least in part -
    - only through individual testimony?               It is easy enough to see why
    the    answer    might      be,   "No."      How    will   common     rather    than
    individualized issues predominate after certification if each
    class member's claim depends on testimony as individualized as, to
    take   this     case   as   an    example,   whether    the   class    member    had
    expressly agreed to receive a fax from the defendant before the
    defendant sent it?
    This case also results in the same answer to that
    question that we gave in Asacol:             The class certification request
    must be denied on predominance grounds because the defendant has
    made a seemingly credible promise to challenge the testimony that
    each class member would give if required to do so at a trial on
    that issue.      Thus, here, as there, we reject a class certification
    request on predominance grounds, despite the important role that
    a class action would play in making meaningful relief possible for
    the defendant's alleged wrongs.
    It is safe to assume that our "predominance" holding in
    this case will not go unnoticed.                District Court judges in our
    Circuit thoughtfully expressed the concern in the wake of Asacol
    - 33 -
    that we had construed the predominance requirement there too
    strictly.     See, e.g., In re Loestrin 24 FE Antitrust Litig., 
    410 F. Supp. 3d 352
    , 403-04 (D.R.I. 2019) (Smith, C.J.); In re Intuniv
    Antitrust Litig., No. 1:16-cv-12396, 
    2019 WL 3947262
    , at *7 n.8
    (D. Mass. Aug. 21, 2019) (Burroughs, J.).      Our reliance on Asacol
    here may increase the concern that we are mistakenly construing
    the predominance requirement to render Rule 23, at least in certain
    important categories of cases, incapable of protecting "the rights
    of groups of people who individually would be without effective
    strength to bring their opponents into court at all."            Amchem
    Prods., Inc. v. Windsor, 
    521 U.S. 591
    , 617 (1997) (quotation marks
    omitted); see also In re New Motor Vehicles Canadian Exp. Antitrust
    Litig., 
    522 F.3d 6
    , 8 (1st Cir. 2008) ("[A]n erroneous failure to
    certify a class where individual claims are small may deprive
    plaintiffs     of   the   only   realistic   mechanism   to   vindicate
    meritorious claims.").
    Nonetheless, I continue to think that our decision in
    Asacol was right, and I am in full agreement with my colleagues
    that it requires that we affirm the District Court's denial of the
    motion to certify the class in this case.         I write separately,
    though, to emphasize the limits on the scope of our holding in
    - 34 -
    Asacol and to explain how our holding in this case accords with
    them.
    Asacol's limits are worth highlighting because they
    convince me that the concern that we are unduly cutting back on
    Rule 23 through our construction of the predominance requirement
    is misplaced, or, at least, premature.            The current state of our
    precedent does not preclude certification in cases in which the
    putative class members' claims depend on an individualized means
    of proof just because the defendant has vowed to challenge each
    class   member's     showing   at   trial    if    the      request    for    class
    certification   is    granted.      Instead,      as   I    will    explain,    our
    precedent in this area leaves open various viable means by which
    a putative class can satisfy the predominance requirement in such
    cases even if the defendant makes that promise about its litigation
    strategy going forward.
    I.
    Before Asacol, we had decided a very similar case: In re
    Nexium Antitrust Litig., 
    777 F.3d 9
     (1st Cir. 2015).                   A review of
    Nexium's own limitations -- and how Asacol responded to them -
    - helps to place our precedent in this area in its proper context.
    The named plaintiffs in Nexium were suing AstraZeneca,
    which was the holder of several patents related to the anti-
    heartburn    drug    Nexium,   as   well     as   several      of     its    generic
    pharmaceutical competitors.         
    Id. at 13-14
    .          The named plaintiffs
    - 35 -
    alleged that the defendants had violated state antitrust laws by
    entering into agreements not to compete with three generic drug
    manufacturers and that, as a result, AstraZeneca had overcharged
    for Nexium between 2008 and 2014.               
    Id.
        The named plaintiffs also
    sought certification of a class consisting of all persons or
    entities who had purchased Nexium during that six-year period (with
    certain limitations unnecessary to enumerate here).                      
    Id. at 14
    .
    The defendants objected to the certification of the
    proposed class on the ground that expert evidence showed that it
    contained "some number of brand-loyal consumers who would [have]
    continue[d] to purchase branded Nexium even when a generic bec[ame]
    available."       
    Id. at 20
    .       The defendants argued that "the [brand-
    loyalist issue] present[ed] problems that [the] plaintiffs [could
    not]    overcome,    for       [the]   plaintiffs      ha[d]     no    methodology   to
    identify . . . those consumers who would have switched to a generic
    version."     
    Id.
     (first alteration in original).
    The     Nexium       defendants      were     in     part     mounting    a
    "categorical challenge" to the bid for class certification on the
    ground    that     "the    hypothetical         nature    of     the    inquiry   into
    [antitrust]       injury . . .         turned     on     what     was     necessarily
    speculation      about     a    plaintiff's . . .        [individual]      purchasing
    preference."      Asacol, 907 F.3d at 59-60 (Barron, J., concurring).
    Nexium rejected that aspect of the defendants' challenge, because
    an     individual    class        member    could        prove    the     defendant's
    - 36 -
    anticompetitive conduct caused injury under the applicable state
    antitrust law through "testimony . . . that, given the choice, he
    or she would have purchased the generic."              Nexium, 777 F.3d at 20.
    Nexium explained that "[s]uch testimony, if unrebutted,
    would be sufficient to establish injury in an individual action."
    Id.   It further explained that, because "[t]here cannot be a more
    stringent burden of proof in class actions than in individual
    actions," "similar testimony in the form of an affidavit or
    declaration would be sufficient in a class action" to prove the
    alleged antitrust injury.       Id.
    The     Nexium     defendants        did     also     argue   that     the
    contemplated affidavits could not save the class certification
    request because, under Rule 23's predominance requirement, "any
    mechanism of [proving injury] that requires determination of the
    individual circumstances of class members is improper."                       Id. at
    21.     But,    Nexium     rejected     this    ground        for   denying    class
    certification as well.
    Nexium emphasized that "the Supreme Court . . . and the
    circuits in other cases have made clear that the need for some
    individualized determinations at the liability and damages stage
    does not defeat class certification."                Id. (citing Amgen Inc. v.
    Conn. Ret. Plans & Tr. Funds, 
    568 U.S. 455
    , 469 (2013)).                 Moreover,
    the defendants had not asserted that they would -- let alone that
    they feasibly could -- challenge the claims of antitrust injury,
    - 37 -
    class member by class member, at trial in the event of class
    certification, as the defendants had not at any point asserted
    that   they    would   challenge   the   class    members'   affidavits   if
    submitted.      See Asacol, 907 F.3d at 52.
    Thus, although   Nexium affirmed certification of the
    class at issue there, it did not hold that a putative class could
    always fend off a defendant's predominance-based challenge just by
    offering to submit affidavits previewing how the class members
    would testify at trial.        Nexium held only that such affidavits
    could allow the putative class to defend against such a challenge
    to certification if the affidavits were unrebutted.
    It was against this backdrop that we then decided Asacol.
    There, we once again addressed a request to certify a class made
    up of individuals claiming an injury under state antitrust laws
    premised on the defendants' allegedly anticompetitive efforts to
    keep a cheaper generic off the market.           Id. at 44-45.
    The proponents of class certification in Asacol invoked
    Nexium to explain why affidavits from members of the putative class
    attesting to their willingness to buy the generic would solve any
    predominance problem.       See id. at 52.        But, we concluded that
    Nexium did not support the certification request.            See id. at 52-
    53.
    We explained that the Asacol defendants had done exactly
    what the defendants in Nexium had not.             In addition to putting
    - 38 -
    forth expert evidence showing that some class members were brand
    loyal (though without identifying any specific individuals who
    were), the Asacol defendants had "expressly stated their intention
    to challenge any affidavits that might be gathered" from class
    members asserting that they would have bought the generic drug had
    they been given the choice to do so.         Id. at 52.
    We acknowledged that "'unrebutted testimony' . . . in an
    affidavit could be used prior to trial to obtain summary judgment,
    thereby efficiently and fairly removing the issue of injury-in-
    fact from the case for trial."          Id. (quoting Nexium, 777 F.3d
    at 21).    But, we pointed out, "[t]estimony that is genuinely
    challenged, certainly on an element of a party's affirmative case,
    cannot secure a favorable summary judgment ruling disposing of the
    issue."   Id. at 53 (emphasis added).
    We   thus    concluded    that    it   was    dispositive     of   the
    predominance   issue   that   those   seeking     class      certification    in
    Asacol had offered no response to the defendants' assertion that
    they intended to challenge any affidavits that might be produced
    by class members denying their brand loyalty.                See id. at 52-54.
    The class would not be able to "rely on unrebutted testimony in
    affidavits to prove injury-in-fact" as the case unfolded post-
    certification.   id.   at   53.     That    being      so,   the   contemplated
    affidavits could not preclude the need for mini-trials on the
    merits of the disputed issue concerning injury.                    It therefore
    - 39 -
    followed that the putative class could not rely on the affidavits
    to surmount the defendants' predominance-based objection to class
    certification, given the number of plaintiffs who seemingly would
    have had to take the stand post-certification if the defendants
    pressed their Seventh Amendment and due process rights to the end.
    See id.
    Asacol was no more categorical in denying certification
    on predominance grounds, however, than Nexium had been in granting
    certification in the face of a predominance challenge.            Asacol did
    hold that the predominance requirement could not be satisfied in
    the face of a defendant's asserted intent to press its rights all
    the way through trial.         But, it did so in a case in which the
    putative class had offered no basis for deeming that threat to be,
    in effect, an empty one.        See id. at 61 (Barron, J., concurring)
    ("[T]he plaintiffs do not argue that the defendants would be
    incapable of mounting effective challenges to any, let alone to
    most, of the plaintiffs' affidavits at summary judgment.              Nor may
    we   conclude   that    the   plaintiffs   would   only   need   to   rely   on
    individualized proof of injury for a small identifiable subset of
    the class . . . .").
    In   light    of   this   important     limitation    on   Asacol's
    holding, its primary significance in my view is not to be found in
    the outcome in that specific case.            It is to be found in the
    structure of the inquiry that it required a district court to
    - 40 -
    undertake in every case in which it must determine whether a
    putative class can satisfy the predominance requirement.
    Asacol   makes   clear     that   to    assess   predominance    a
    district court must consider, in a realistic but rigorous manner,
    how a trial would proceed in the event of certification.                 Asacol
    thus requires a district court, in undertaking that assessment, to
    make a prediction about what would happen post-certification if
    the defendant were to follow through and challenge the claims of
    the putative class members by asking whether certification would
    result in, as we put it then, inefficiency (which "can be pictured
    as a line of thousands of class members waiting their turn to offer
    testimony and evidence on individual issues") or unfairness (which
    can be "pictured as an attempt to eliminate inefficiency by
    presuming to do away with the rights a party would customarily
    have to raise plausible individual challenges on those issues").
    Id. at 51-52.
    Importantly, then, Asacol leaves open the possibility
    that a district court's predictive assessment might not paint the
    concerning picture of how the post-certification litigation would
    unfold   (even    assuming     no     settlement)     that    would    preclude
    certification of a class on predominance grounds.              Accordingly, I
    understand     Asacol   to    leave    open    the   possibility      that   the
    predominance requirement might be met even in a case involving a
    - 41 -
    claim in which the members of the putative class must rely on a
    means of proof that is individualized.
    II.
    We come, then, to the case at hand.          Here, we once again
    conclude on predominance grounds that the proposed class cannot be
    certified.     But, in doing so, we break no ground that Asacol did
    not already break.
    As in Asacol, the claim of class members in this case
    depends on knowledge that is specific to each one:                here, whether
    the class member provided advance permission to receive the kind
    of fax at issue.       As in Asacol, the defendant in this case has
    vowed   to   contest   each     class    member's   claim    on    that    highly
    individualized issue, thereby suggesting that each such member
    will have to provide individualized testimony -- one by one -- at
    trial   on   it.    And,   as    in     Asacol,   the    proponent    of   class
    certification here has not explained how the evidentiary realities
    on the ground undermine the defendant's assertion that it can force
    a trial on the disputed issue as to each class member.
    Indeed, if anything, the defendant's promise to contest
    the class-member testimony at trial post-certification is even
    more credible here than it was in Asacol.               It comes supported by
    affidavits of the defendant's own from class members.                 Yet, the
    proponent of certification, Bais Yaakov, has failed to identify a
    persuasive ground for doubting the defendant's showing that a
    - 42 -
    stream   of    mini-trials     likely    awaits    on   the   other    side    of
    certification.
    True,   Bais   Yaakov   contests    the   significance    of    the
    undisputed evidence that thousands of schools had asked for ACT to
    send them publications while supplying it with a fax number.                 Bais
    Yaakov responds that, because the recipient's prior consent to
    receiving a faxed advertisement is an affirmative defense that the
    defendant bears the burden of proving, that evidence does not
    suffice to show that issues of consent would have to be adjudicated
    class member by class member at trial.              Bais Yaakov relies for
    that contention on the TCPA's requirement that the defendant show
    that there was express permission given in advance applicable to
    each advertisement that it faxed.
    It is far from clear that requirement in the TCPA would
    spare an individualized inquiry into the nature of a class member's
    relationship to ACT.         But, even if we assume that the TCPA makes
    the bar for establishing the express-permission defense as high as
    Bais Yaakov construes it to be, there remains the fact that ACT
    has introduced affidavits from seventy-odd schools to bolster its
    predominance case.       ACT contends that those affidavits show that
    those schools did expressly consent to the receipt of such faxes
    - 43 -
    when they requested publications from ACT while supplying their
    fax numbers to it.
    Bais Yaakov does not attempt in response to make anything
    of    the    fact    that   these     affidavits    concern   only      seventy-odd
    schools -- and thus merely "a small identifiable subset of the
    class's members."5 In re Asacol Antitrust Litig., 
    907 F.3d 42
    , 61
    (1st Cir. 2018) (Barron, J., concurring). For example, Bais Yaakov
    makes       no   argument   that    ACT    "would   be   incapable   of   mounting
    effective challenges" to a non-de minimis number of class members'
    claims, 
    id.
     (Barron, J., concurring), because speculation alone
    supports the notion that ACT would be able to obtain either
    additional affidavits beyond those that it has produced or any
    similar evidence that could suffice to create a genuine issue of
    disputed fact as to whether those class members consented to
    receiving the faxes, 
    id. at 53
                 ("Nor have the plaintiffs provided
    any   basis       from   which   we   could    conclude    that   the    number   of
    affidavits to which the defendants will be able to mount a genuine
    challenge is so small that it will be administratively feasible to
    require those challenged affiants to testify at trial."); see also
    
    id. at 52-53
     ("Nor do plaintiffs point to any basis in the record
    for deeming all such challenges [by the defendants] to be so
    ACT's records indicate that it sent more than 28,355 fax
    5
    advertisements between June 30, 2008, and June 30, 2012.    Bais
    Yaakov of Spring Valley v. ACT, Inc., 
    328 F.R.D. 6
    , 9 (D. Mass.
    2018).
    - 44 -
    implausible as to warrant a finding that we can consider the issue
    to be uncontested.").
    In fact, Bais Yaakov's only argument with respect to the
    affidavits from school officials is that none shows that even those
    officials'     own        schools   gave    the   requisite    prior    express
    permission.        But, as we explain, that contention is not tenable,
    given what those affidavits indisputably show.
    As a result, much like in Asacol itself, the proponent
    of certification here has failed to explain how the claim of each
    class member could be dealt with post-certification in a manner
    that would not be "inefficient or unfair."                 
    Id. at 51
    .     Thus,
    because the proponent of class certification bears the burden of
    satisfying the predominance requirement, In re Nexium Antitrust
    Litig., 
    777 F.3d 9
    , 18 (1st Cir. 2015), we must reject this request
    for class certification just as we rejected the one in Asacol.
    III.
    For the reasons set forth above, it is clear to me that
    our decision today does not extend Asacol beyond its own limits.
    But, I do think it is important not to lose sight of the reasons
    for those limits.           Attending to them will ensure that neither
    Asacol nor this case is understood to impose a greater bar to class
    certification than it does.
    For    one    thing,   I   understand   the   limited   nature   of
    Asacol's predominance holding to reflect a recognition that even
    - 45 -
    in an individual action involving a claim that necessarily depends
    on individualized testimony, the plaintiff may be able to secure
    summary judgment in her favor based on an affidavit previewing
    that testimony.   After all, a defendant in an individual action
    cannot defeat a motion for summary judgment predicated on an
    affidavit previewing the plaintiff's testimony merely by asserting
    that it will contest that testimony at trial.       See In re Asacol
    Antitrust Litig., 
    907 F.3d 42
    , 53 (1st Cir. 2018).      The defendant
    must make a showing at the summary judgment stage that suffices to
    put the contents of the plaintiff's affidavit in doubt.            See
    Triangle Trading Co. v. Robroy Indus., 
    200 F.3d 1
    , 2 (1st Cir.
    1999)   (explaining   that   "[c]onclusory   allegations,   improbable
    inferences, and unsupported speculation" cannot give rise to a
    genuine issue of disputed fact (quoting Smith v. F.W. Morse & Co.,
    
    76 F.3d 413
    , 428 (1st Cir. 1996))).
    For another thing, I understand the limited nature of
    Asacol's predominance holding to reflect a recognition that a class
    cannot be held to a higher standard in moving for summary judgment
    than the standard to which its members would be held in moving for
    summary judgment in individual actions of their own.        See id. at
    52; Nexium, 777 F.3d at 20 ("There cannot be a more stringent
    burden of proof in class actions than in individual actions.");
    see also Tyson Foods, Inc. v. Bouaphakeo, 
    577 U.S. 442
    , 456-57
    (2016) (allowing a class to rely on representative statistical
    - 46 -
    evidence because each member "likely would have had to introduce
    [that] study" if the members "had proceeded with 3,344 individual
    lawsuits").   Thus, I understand Asacol to recognize that, if an
    individual class member could win at summary judgment on an issue
    dependent on individual testimony      and central to the claim   in
    her own individual action, that class member also could do so on
    the strength of that same showing as a member of a class made up
    of numerous individuals.
    Accordingly, I understand Asacol to be in line with our
    prior precedent recognizing that when a district court assessing
    predominance "supportably finds that an issue which, in theory,
    requires individualized factfinding is, in fact, highly unlikely
    to survive typical pretrial screening (such as a motion to strike
    or a motion for summary judgment), a concomitant finding that the
    issue neither renders the case unmanageable nor undermines the
    predominance of common issues generally will be in order."    Waste
    Mgmt. Holdings, Inc. v. Mowbray, 
    208 F.3d 288
    , 298 (1st Cir. 2000)
    (emphasis added).6   After all, due to the lack of any need for a
    6 It is worth noting that the inquiry that I contemplate a
    district court undertaking here is not particularly novel, even in
    the class action context. As to any request to certify a class,
    the district court must assess whether the class definition is
    sufficiently "definite" so as to "allow the class members to be
    ascertainable." Nexium, 777 F.3d at 19. In Nexium, we concluded
    that the proposed class "satisfie[d] th[at] standard[] by being
    defined in terms of purchasers of Nexium during the class period,"
    id., even though the determination of whether any particular
    - 47 -
    "mini-trial on the issue" in that circumstance, Amgen Inc. v. Conn.
    Ret. Plans & Tr. Funds, 
    568 U.S. 455
    , 477 (2013), the concerning
    picture that Asacol paints of long lines of plaintiffs waiting to
    give testimony at the courthouse will fade to black.
    Because of this understanding of Asacol, I do not read
    it to hold that a putative class may surmount a defendant's
    predominance-based challenge to certification only by showing that
    class members are entitled to invoke a presumption in their favor
    on the individualized aspect of their claim that the defendant
    vows to dispute at trial. Asacol did recognize that in Halliburton
    Co. v.   Erica   P.   John   Fund,   the   Supreme   Court   relied   on   the
    existence of such a legal presumption in rejecting a predominance-
    based challenge to certification, see Asacol, 907 F.3d at 53
    (citing Halliburton, 
    573 U.S. 258
     (2014)).           And, in rejecting the
    request for class certification in Asacol, we did note that the
    putative class members there were not entitled to any presumption
    regarding their willingness to purchase a generic under the state
    antitrust laws that supplied their causes of action. 
    Id.
    But, a closer look at Halliburton's logic suggests that
    the entitlement to invoke a presumption like the one that applied
    individual falls within that class is an inherently individualized
    one that the defendants there in theory could have contested. Yet,
    we expressed no concern -- and no one argued -- that this feature
    of the inquiry on its own automatically destroyed the efficiencies
    that make class actions a valuable procedural device.
    - 48 -
    there may not be a prerequisite to a putative class satisfying the
    predominance requirement in the face of a defendant's assertion
    that the putative class's underlying claim can be proved only
    through individualized testimony from each class member.                     Nor does
    Asacol,   as   I   read    it,    indicate    that   it    adopted    a     different
    understanding of Halliburton on that score.
    The Supreme Court in Halliburton considered a request
    for certification of a class of those alleging that Halliburton
    Co. had violated section 10(b) of the Securities Exchange Act of
    1934 and Securities and Exchange Commission Rule 10b-5 by making
    a series of material misrepresentations to try to inflate its stock
    price.    573 U.S. at 264.       The Court had held in a prior case, Basic
    Inc. v.    Levinson,      
    485 U.S. 224
       (1988),     that   "requiring . . .
    direct proof of reliance [in such an individual securities fraud
    action] 'would place an unnecessarily unrealistic evidentiary
    burden on the [investor],'" because the investor would "have to
    'show a speculative state of facts, i.e., how he would have
    acted . . .    if    the    misrepresentation        had     not     been    made.'"
    Halliburton, 573 U.S. at 267 (fourth alteration in original)
    (quoting Basic, 
    485 U.S. at 245
    ).                 Basic thus had held that
    investors could "invok[e] a presumption that a public, material
    misrepresentation will distort the price of stock traded in an
    efficient market, and that anyone who purchases the stock at the
    - 49 -
    market price may be considered to have done so in reliance on the
    misrepresentation."         
    Id. at 283-84
    .
    The    putative      class   in   Halliburton     pointed      to   this
    presumption of reliance as a reason to reject the predominance-
    based challenge to class certification that the defendants were
    pressing in that case.            See 
    id. at 265-66
    .       The notion was that
    the crucial issue of class member reliance on the defendants'
    alleged misinformation could be proved on a class-wide basis -
    - rather than class member by class member through individualized
    testimony at trial -- in consequence of the presumption of reliance
    that Basic had recognized each class member was entitled to invoke.
    See 
    id. at 267-68
    .
    In considering that contention, Halliburton did note
    that there were features of the presumption that arguably favored
    the defendants' position regarding predominance.                      For example,
    "Basic [had] emphasized that the presumption of reliance was
    rebuttable    rather       than   conclusive,"    
    id. at 268
    ,   and    that   a
    defendant could defeat that presumption by making "[a]ny showing
    that severs the link between the alleged misrepresentation and
    either the price received (or paid) by the plaintiff, or [the
    plaintiff's] decision to trade at a fair market price," 
    id. at 269
    (first alteration in original) (quoting Basic, 
    485 U.S. at 248
    ).
    But,    the    Court   ultimately     held    that   there     was     no
    predominance-based         reason    to   deny   class    certification.          The
    - 50 -
    defendant's "opportunity to rebut the presumption of reliance" on
    an "individual" basis did have, according to the Court, "the effect
    of 'leav[ing] individualized questions . . . in the case.'"                          
    Id. at 276
     (first alteration in original) (quoting 
    id. at 295
     (Thomas,
    J.,   concurring       in       the   judgment)).         Nevertheless,     the    Court
    explained, that was "no reason to think that these questions
    w[ould]    overwhelm        common     ones."       
    Id.
         For,   while     the   Court
    acknowledged that a defendant might be able to show that an
    individual class member "would have bought or sold the stock even
    had he been aware that the stock's price was tainted by fraud,"
    
    id. at 269
    , it determined that the prospect "[t]hat the defendant
    might attempt to pick off the occasional class member here or there
    through    individualized             rebuttal     does     not    cause    individual
    questions to predominate."              
    Id. at 276
    .
    Halliburton in this respect may be understood to have
    determined that it would be --                to use our own way of putting the
    point -- "highly unlikely" that a defendant would have much luck
    puncturing       an   otherwise       unrebutted     case    for   finding    investor
    reliance    in    such      a    securities     fraud     case.    See     Waste   Mgmt.
    Holdings, Inc., 
    208 F.3d 288
    , 298 (1st Cir. 2000).                         But, if so,
    then there is no reason why, in principle, a court could not make
    a similar assessment based on the prospect of affidavits previewing
    - 51 -
    class member testimony in certain types of case in which no such
    presumption applies.
    Of course, the defendant in a case of that kind would
    still have the "opportunity," Halliburton, 573 U.S. at 276, to
    make a responsive showing that would suffice to establish at the
    certification stage that after certification were granted it would
    be able to create a genuine dispute of material fact as to the
    putative class members' claims, despite the affidavits previewing
    their testimony on the critical issue.               But, the defendants in
    Halliburton had a similar opportunity in that case to cast doubt
    on    the   putative    class    members'   claims    --   supported   by    the
    presumption recognized in Basic -- to have relied on misleading
    investment information.          And yet the Court did not think that bare
    possibility a reason to conclude that individualized issues would
    predominate, as it implicitly predicted that it would be difficult
    for a defendant to produce evidence that could cast doubt on the
    reliance of more than "the occasional class member here or there."
    Id.
    Of course, even when the putative class points to the
    affidavits from class members that it could use to secure summary
    judgment on the disputed issue, the defendant may well find it
    quite easy at the certification stage to demonstrate that there is
    a    predominance      problem    nonetheless.   A   defendant   might      have
    business records that suffice to permit it to do just that.                 Or,
    - 52 -
    it might even have affidavits from putative class members -- as
    ACT has here -- that are representative of more than a de minimis
    chunk of the class and that thus would suffice to put a substantial
    number of the class members' own affidavits in doubt.
    In other cases, though, a defendant might turn out to
    have a difficult time identifying evidence of that kind at the
    certification stage.         Halliburton itself is, of course, an example
    of a case in which, by virtue of a strong presumption, that was
    so.    But, even in a case involving a claim akin to the ones in
    Nexium or Asacol, for which no similar presumption applies, it may
    not be easy for the defendant to demonstrate that there is a
    predominance problem.
    A plaintiff's representation about how it would have
    acted if the world had been different than it was (such as a
    consumer's testimony about whether she would have purchased a
    generic     drug   cheaper    than   the   brand-named   one   that   she   had
    previously used) is, by its nature, not easily undermined.              It is
    thus not clear to me how a defendant could show that it would be
    able   to     genuinely      challenge     such   a   representation    post-
    certification if faced with the prospect of affidavits from class
    members attesting to something so peculiarly within their own
    knowledge.
    True, a defendant in a case similar to Asacol could
    respond to the prospect of affidavits disclaiming brand loyalty by
    - 53 -
    pointing to class members' health plan purchasing records.          But
    such documents might merely highlight that a class defined by
    price-sensitive health plans -- indicating a lack of brand loyalty
    -- would still be a viable one. See Asacol, 907 F.3d at 61 (Barron,
    J., concurring).
    I also do not understand our precedent to this point to
    establish that a defendant's invocation of expert statistical
    evidence about the presence of uninjured class members materially
    changes the analysis that a district court must undertake.           In
    Asacol, the district court did find based on expert testimony that
    approximately ten percent of the putative class was brand loyal
    and thus uninjured, 907 F.3d at 46-47, and we then held that this
    evidence indicated that the inherently individualized issue of
    brand loyalty presented a predominance concern, given the "needle
    in a haystack" problem, id. at 61 (Barron, J. concurring).         But,
    we did not go on to suggest that such statistical evidence sufficed
    on its own to establish that the individual class members would
    not have been able to obtain summary judgment as to the issue of
    brand loyalty had they introduced affidavits attesting that they
    would have been willing to buy the cheaper generic if it had been
    available.       Such   statistical   evidence   would   neither   have
    established that any single class member was personally brand loyal
    nor even provided a basis for finding by a preponderance that any
    one of them was.    See Nexium, 777 F.3d at 20; see also Tyson Foods,
    - 54 -
    Inc. v. Bouaphakeo, 
    577 U.S. 442
    , 458 (2016) (explaining that the
    introduction     of   representative     evidence     in     Wal-Mart    Stores,
    Inc. v. Dukes, 
    564 U.S. 338
     (2011), "would have violated the Rules
    Enabling Act by giving plaintiffs and defendants different rights
    in   a   class   proceeding   than    they    could   have    asserted    in   an
    individual action"); cf. Charles Nesson, The Evidence or the Event?
    On Judicial Proof and the Acceptability of Verdicts, 
    98 Harv. L. Rev. 1357
    , 1378-80 (1985) (explaining the "blue bus hypothetical,"
    in which a plaintiff loses in his suit against the Blue Bus Company
    before    reaching    the   jury   because    a   "factfinder    c[ould]   only
    conclude from the plaintiff's evidence that there was an 80% chance
    that he was injured by the Blue Bus Company and a 20% chance that
    he was not").
    IV.
    I do not seek here to define with any precision the
    showing at the certification stage that a defendant must make in
    the face of an assertion by the proponent of certification that
    common questions will predominate.            I also do not seek here to
    define precisely the showing that the certification proponent must
    make to rebut the defendant's contention that common issues will
    not.     Nor, finally, do I mean to catalog the specific types of
    - 55 -
    cases that are more or less susceptible to being challenged on
    predominance grounds.
    The    reviewing      court's      task   when   it    comes    to    the
    predominance requirement is to make a reasoned judgment about how
    the litigation would proceed in the event of certification.                          It
    must make that judgment by predicting how many individual mini-
    trials would be required if the class were certified, which in
    turn entails a forecast about whether it is "highly unlikely" that
    the defendant will be able to stave off a post-certification motion
    for summary judgment.          Waste Mgmt. Holdings, Inc., 
    208 F.3d 288
    ,
    298 (1st Cir. 2000).           The showing required of both the putative
    class   and    the    defendant      at    the    certification       stage    as   to
    predominance thus will necessarily vary from case to case, in line
    with the nature of the underlying claim and the type of issue that
    it   requires       class     members     to   prove    through      individualized
    showings.      The summary judgment standard is such that I do not
    hazard more categorical observations.
    Still, the showings must have enough substance to them
    to   permit    the    court    to   engage     meaningfully     in    the    required
    predictive exercise.           And, in determining how much substance is
    enough, it is important to keep in mind both that the district
    court's judgment on that score is entitled to deference, see In re
    Asacol Antitrust Litig., 
    907 F.3d 42
    , 51 (1st Cir. 2018) (reviewing
    the certification decision for abuse of discretion), and that a
    - 56 -
    certifying     court    will     have    an      opportunity     to    revise    that
    determination     if    in     reality       proceeding    as    a    class     proves
    unworkable, Gen. Tel. Co. of Sw. v. Falcon, 
    457 U.S. 147
    , 160
    (1982) ("Even after a certification order is entered, the judge
    remains free to modify it in the light of subsequent developments
    in the litigation.").
    It is also important to keep in mind that we have never
    indicated that, in a case where affidavits from class members are
    required to show that they can prove their claim, it would be an
    abuse of discretion for a district court to certify a class unless
    the putative class has already in fact collected and introduced
    those affidavits into the record.                 See In re Nexium Antitrust
    Litig., 
    777 F.3d 9
    , 20-21, 24 (1st Cir. 2015).                        Nor is there
    anything in our case law to indicate that a defendant must actually
    collect and introduce at the certification stage all of the
    evidence on which it would rely in the merits phase, including the
    evidence it would introduce in order to oppose summary judgment.
    Indeed, I would be concerned that requirements to that effect would
    conflict with the principles that undergird Rule 23(b)(3), and
    upset the careful balance that the (b)(3) class action procedure
    strikes   between      efficiency       of    litigation   and       fidelity    to   a
    defendant's due process and Seventh Amendment rights.                   See Asacol,
    907 F.3d at 51-52; see also Fed. R. Civ. P. 23 advisory committee's
    note to 1966 amendment ("Subdivision (b)(3) encompasses those
    - 57 -
    cases in which a class action would achieve economies of time,
    effort, and expense, and promote uniformity of decision as to
    persons   similarly   situated,   without   sacrificing   procedural
    fairness or bringing about other undesirable results.").
    That said, a review of the state of our precedent in
    this area reveals to me that there is still much to be decided
    when it comes to the predominance requirement, notwithstanding our
    important holdings to date establishing the applicable framework
    that must be used to decide future cases implicating it.    For that
    reason, while I join the majority in full in affirming the District
    Court's denial of certification for this class, just as I joined
    the majority in Asacol itself, I think it important to emphasize
    here, as I thought it important to emphasize there, the limited
    nature of our holding in this case.    For, I am confident that, as
    a consequence of this decision, our current precedent in this area
    continues to ensure that viable opportunities remain for securing
    class certification in cases involving claims that inherently
    depend on highly individualized means of proof, no matter how
    intently a defendant may represent at the certification stage that
    it wishes to contest those means at any trial that might ensue.
    - 58 -