Of course, the State’s proof could perhaps be regarded as more certain if it had convinced all 12 jurors instead of only nine; it would have been even more compelling if it had been required to convince and had, in fact, convinced 24 or 36 jurors. But the fact remains that nine jurors—a substantial majority of the jury—were convinced by the evidence. In our view disagreement of three jurors does not alone establish reasonable doubt, particularly when such a heavy majority of the jury, after having considered the dissenters’ views, remains convinced of guilt. That rational men disagree is not in itself equivalent to a failure of proof by the State, nor does it indicate infidelity to the reasonable-doubt standard. Jury verdicts finding guilt beyond a reasonable doubt are regularly sustained even though the evidence was such that the jury would have been justified in having a reasonable doubt; even though the trial judge might not have reached the same conclusion as the jury, and even though appellate judges are closely divided on the issue whether there was sufficient evidence to support a conviction. That want of jury unanimity is not to be equated with the existence of a reasonable doubt emerges even more clearly from the fact that when a jury in a federal court, which operates under the unanimity rule and is instructed to acquit a defendant if it has a reasonable doubt about his guilt…. If the doubt of a minority of jurors indicates the existence of a reasonable doubt, it would appear that a defendant should receive a directed verdict of acquittal rather than a retrial. We conclude, therefore, that verdicts rendered by nine out of 12 jurors are not automatically invalidated by the disagreement of the dissenting three. Appellant was not deprived of due process of law.