Lester Del Rey,
Imitation of death
(1950)
“ Slim's mouth dropped open and his burden slipped from his back to the floor with a sodden thump, while he stared from one Greek to the other, and back to the first. His fingers were stretched in the ancient sign of the horns as he watched the changing of accumulators, and his voice was hoarse and uncertain. "A damned robot!""Not a robot—a similacrum," denied the owl-eyed man who must have been the original of the metal creature. "I'm a mimesist, not a creator. A robot has independent life, but that's only a limited copy of my memories and habits, like this phoney Curtis. ”
