"1883-04-12Z"^^ . . "1964Z"^^ . . . "Clarence Irving Lewis"@en . . "Clarence Irving Lewis (April 12, 1883 \u2013 February 3, 1964), usually cited as C. I. Lewis, was an American academic philosopher and the founder of conceptual pragmatism. First a noted logician, he later branched into epistemology, and during the last 20 years of his life, he wrote much on ethics. The New York Times memorialized him as \"a leading authority on symbolic logic and on the philosophic concepts of knowledge and value.\""@en . . "American philosopher" . . . . . . "1883Z"^^ . . "Lewis, Clarence Irving"@en . . "1964-02-03Z"^^ . . . . . . . .