Abstract

Reid defends the distinction between primary and secondary qualities. He does so in spite of accepting Berkeley’s critique of Locke on this issue and rejecting the Cartesian thesis that the distinction is based on reason. Reid contends that we have a clear, direct, and distinct conception of primary qualities but not of secondary qualities. We shall attempt to explain how Reid could defend the distinction while rejecting the resemblance theory of Locke and the rationalistic theory of Descartes.