Abe Fortas,
Dennis v. United States (384 U.S. 855…
“ In any event, 'it will be extremely difficult for even the most able and experienced trial judge under the pressures of conducting a trial to pick out all of the grand jury testimony that would be useful in impeaching a witness.' Pittsburgh Plate Glass, 360 U.S., at 410, 79 S.Ct., at 1246 (dissenting opinion) . Nor is it realistic to assume that the trial court's judgment as to the utility of material for impeachment or other legitimate purposes, however conscientiously made, would exhaust the possibilities. In our adversary system, it is enough for judges to judge. ”
