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      Scientific American May 1981

      Metamagical Themas, June 1981

      A coffeehouse conversation on the Turing test to determine if a machine can think

      • By Douglas R. Hofstadter on May 1, 1981

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      More in the May 1981 issue of Scientific American
      • Books, June 1981
      • Letters to the Editors, June 1981
      • The Crest of the East Pacific Rise
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