The Computer could do no wrong. Then it was asked a simple little question by a simple little man. The little man had a head like an old-fashioned light bulb and a smile that seemed to say he had secrets from the rest of the world. He didn't talk much, just an occasional "Oh," "Mm" or "Ah." Krayton figured he must be all right, though. After all he'd been sent to Computer City by the Information Department itself, and his credentials must have been checked in a hundred ways and places. "Essentia