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Person

Alfred Tarski

A man with gray hair and glasses, wearing a black suit jacket, a bow tie, and a light-colored shirt, stands against a dark background.

Polish-American logician (1901–1983), counted among the four most important logicians of the twentieth century. Tarski recast the formal definition of truth, founded model theory, and worked across set theory, algebra, and geometry. He left Poland for a lecture tour in August 1939, was stranded in the United States by the outbreak of war, and spent the rest of his career at Berkeley, training a generation of logicians.

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