Roberts, C.J., concurring in judgment
framework, moreover, came out of thin air. Neither the Texas statute challenged in Roe nor the Georgia statute at issue in its companion case, Doe v. Bolton, 410 U. S. 179 (1973), included any gestational age limit. No party or amicus asked the Court to adopt a bright line viability rule. And as for Casey, arguments for or against the viability rule played only a de minimis role in the parties’ briefing and in the oral argument. See Tr. of Oral Arg. 17–18, 51 (fleeting discussion of the viability rule).
It is thus hardly surprising that neither Roe nor Casey made a persuasive or even colorable argument for why the time for terminating a pregnancy must extend to viability. The Court’s jurisprudence on this issue is a textbook illustration of the perils of deciding a question neither presented nor briefed. As has been often noted, Roe’s defense of the line boiled down to the circular assertion that the State’s interest is compelling only when an unborn child can live outside the womb, because that is when the unborn child can live outside the womb. See 410 U. S., at 163–164; see also J. Ely, The Wages of Crying Wolf: A Comment on Roe v. Wade, 82 Yale L. J. 920, 924 (1973) (Roe’s reasoning “mistake[s] a definition for a syllogism”).
Twenty years later, the best defense of the viability line the Casey plurality could conjure up was workability. See 505 U. S., at 870. But see ante, at 53 (opinion of the Court) (discussing the difficulties in applying the viability standard). Although the plurality attempted to add more content by opining that “it might be said that a woman who fails to act before viability has consented to the State’s intervention on behalf of the developing child,” Casey, 505 U. S., at 870, that mere suggestion provides no basis for choosing viability as the critical tipping point. A similar implied consent argument could be made with respect to a law banning abortions after fifteen weeks, well beyond the point at which nearly all women are aware that they are pregnant, A. Ayoola, M. Nettleman, M. Stommel, & R. Canady, Time
