"Silence, silence," whispered a loud speaker as they stepped out at the fourteenth floor, and "Silence, silence," the trumpet mouths indefatigably repeated at intervals down every corridor. The students and even the Director himself rose automatically to the tips of their toes. They were Alphas, of course, but even Alphas have been well conditioned. "Silence, silence." All the air of the fourteenth floor was sibilant with the categorical imperative.