Everyone has heard of the Turing test, where you chat with a human and a computer and try to figure out which is which. But few know that this is not the only scenario Alan Turing proposed in his famous 1950 paper "Computing Machinery and Intelligence." In it, he suggested an "imitation game," which plays like 20 Questions for transsexuals: first a man and then a computer pose as female, and the interrogator tries to distinguish them from a real woman.
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