CONTENTS Dear Fellow Scientist: A project is contemplated that will have a crucial bearing on man's future in deep space. Ample non-military Government funds are available. There was a time when professional men scoffed at the Thinkers. Then there was a time when the Thinkers perforce neglected the professional men. Now both times are past. May they never return! I would like to consult you this afternoon, three o'clock sharp, Thinkers' Foundation I. Jorj Helmuth Meanwhile the who?-where? had tossed out a dozen cards. He glanced through them, hesitated at the name "Willard Farquar," looked at the sleeping girl, then quickly tossed them all into the addresso-robot and plugged in the steno-robot. The buzz-light blinked green and he switched the phone to audio. "The President is waiting to see Maizie, sir," a clear feminine voice announced. "He has the general staff with him." "Martian peace to him," Jorj Helmuth said. "Tell him I'll be down in a few minutes." Huge as a primitive nuclear reactor, the great electronic brain loomed above the knot of hush-voiced men. It almost filled a two-story room in the Thinkers' Foundation. Its front was an orderly expanse of controls, indicators, telltales, and terminals, the upper ones reached by a chair on a boom. Although, as far as anyone knew, it could sense only the information and questions fed into it on a tape, the human visitors could not resist the impulse to talk in whispers and glance uneasily at the great cryptic cube. After all, it had lately taken to moving some of its own controls—the permissible ones—and could doubtless improvise a hearing apparatus if it wanted to. For this was the thinking machine beside which the Marks and Eniacs and Maniacs and Maddidas and Minervas and Mimirs were less than Morons. This was the machine with a million times as many synapses as the human brain, the machine that remembered by cutting delicate notches in the rims of molecules (instead of kindergarten paper-punching or the Coney Island shimmying of columns of mercury). This was the machine that had given instructions on building the last three-quarters of itself. This was the goal, perhaps, toward which fallible human reasoning and biased human judgment and feeble human ambition had evolved. This was the machine that