434
Opinion of the Court
ent." 473 U. S., at 682 (opinion of Blackmun, J.); id., at 685 (White, J., concurring in part and concurring in judgment).
Four aspects of materiality under Bagley bear emphasis. Although the constitutional duty is triggered by the potential impact of favorable but undisclosed evidence, a showing of materiality does not require demonstration by a preponderance that disclosure of the suppressed evidence would have resulted ultimately in the defendant's acquittal (whether based on the presence of reasonable doubt or acceptance of an explanation for the crime that does not incul-pate the defendant). Id., at 682 (opinion of Blackmun, J.) (adopting formulation announced in Strickland v. Washington, 466 U. S. 668, 694 (1984)); Bagley, supra, at 685 (White, J., concurring in part and concurring in judgment) (same); see 473 U. S., at 680 (opinion of Blackmun, J.) (Agurs "rejected a standard that would require the defendant to demonstrate that the evidence if disclosed probably would have resulted in acquittal"); cf. Strickland, supra, at 693 ("[W]e believe that a defendant need not show that counsel's deficient conduct more likely than not altered the outcome in the case"); Nix v. Whiteside, 475 U. S. 157, 175 (1986) ("[A] defendant need not establish that the attorney's deficient performance more likely than not altered the outcome in order to establish prejudice under Strickland"). Bagley's touchstone of materiality is a "reasonable probability" of a different result, and the adjective is important. The question is not whether the defendant would more likely than not have received a different verdict with the evidence, but whether in its absence he received a fair trial, understood as a trial resulting in a verdict worthy of confidence. A "reasonable probability" of a different result is accordingly shown when the government's evidentiary suppression "undermines confidence in the outcome of the trial." Bagley, 473 U. S., at 678.
The second aspect of Bagley materiality bearing emphasis here is that it is not a sufficiency of evidence test. A defendant need not demonstrate that after discounting the incul-
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