Abstract

For placing the contrast of certainty and uncertainty at the philosophical center, Descartes is charged with Michael Dummett with mistakenly subordinating the study of language and meaning to epistemology. But Dummett's knowledge-theoretic reading of the certainty/uncertainty duality is as erroneous as the tradition it inherits is long. The Cartesian demand for certainty and critique of uncertainty in mature writings like the Meditations has a definite semantic character. Cartesian uncertainty, construed aright, anticipates Dummett's putatively original idea of a non-reductive yet non-realist semantics for standard factual claims asserted on the basis of sense-evidence. There is an internal relation, in Descartes' philosophy, between a repudiation of uncertainty and a repudiation of a non-realist conception of the world.