Christopher Michael Langan (born c. 1957) is an American autodidact whose IQ was reported by 20/20 and other media sources to have been measured at 195. Billed as possibly “the smartest man in America”, he rose to prominence in 1999 while working as a bouncer on Long Island. Langan is author of the Cognitive-Theoretic Model of the Universe or CTMU (pronounced “cat-mew”), which he describes as “essentially a theory of the relationship between mind and reality”.

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