Sir Karl Raimund Popper(1902-1994), Philosopher
Sitter in 5 portraits
Austrian-born philosopher, came to England in 1946; Professor of Logic and Scientific Method, University of London (1949-69); works include The Logic of Scientific Discovery (Logik der Forschung, 1934), The Open Society and its Enemies (1945) and Objective Knowledge (1972).
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