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Sir Alfred Jules Ayer (1910-1989), Philosopher

Sitter in 12 portraits
Philosopher; Ayer held chairs in philosophy at Oxford University and University College, London. His best-known publication, Language, Truth and Logic (1936), was the leading British statement of logical positivism, his ideas were seen as a radical departure from established philosophy. He was also popularly known after the War as a participant on the radio discussion programme, the Brains Trust.