Descartes and Locke, and it also endorses the subjective tum that they defended. It argues that these positions do not require introducing sense data into the picture, and thus it avoids the intractable problems that the sense datum philosophy introduces. In addition, several versions of cognitive accounts of sense perception are criticized with the result that it is unnecessary to characterize sensory processes in intentional terms. The book then turns to a leading question introduced into modem philosophy by Descartes and Locke, the question of the accuracy of the information delivered by the senses to our faculty of belief. In particular, how accurate are our representations of the secondary qualities? The case of color is considered in detail.