They were robots powered by hydraulics. So, Descartes would walk around the French Royal Gardens and the French Royal Gardens were set up like a seventeenth-century Disneyland. They had these characters that would operate according to water flow and so if you stepped on a certain panel, a swordsman would jump out with a sword. If you stepped somewhere else, a bathing beauty would cover herself up behind some bushes. And Descartes said, “Boy, these machines respond in certain ways to certain actions so machines can do certain things and, in fact, “he says, “our bodies work that way too. If you tap somebody on the knee, your leg will jump out. Maybe that’s what we are.”
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