"Son, quite aside from my own conditioned reflex against munching a roast haunch of--well, you, for example--quite aside from that trained-in emotional prejudice, for coldly practical reasons I regard our taboo against cannibalism as an excellent idea . . . because we are not civilized." "Huh?" "Obvious. If we didn't have a tribal taboo about the matter so strong that you honestly believed it was an instinct, I can think of a long list of people I wouldn't trust with my back turned, not with the price of beef what it is today. Eh?"