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Alfred Jules Ayer
Alfred Jules Ayer
  • Born: October 29, 1910
  • Died: June 27, 1989
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Sir Alfred Jules "Freddie" Ayer FBA, usually cited as A. J. Ayer, was an English philosopher known for his promotion of logical positivism, particularly in his books Language, Truth, and Logic (1936) and The Problem of Knowledge (1956).