Published online by Cambridge University Press: 01 January 2020
1 Dretske, F. ‘Epistemic Operators,’ Journal of Philosophy 67 (1970), 1007–23CrossRefGoogle Scholar
2 See for example, A.I., Goldman ‘Discrimination and Perceptual Knowledge,’ Journal of Philosophy 73 (1976), 771–91.Google Scholar
3 Pitcher, G. A Theory of Perception (Princeton, N.J.: Princeton University Press 1971), 50–7;Google Scholar the version of the argument that I present differs in important respects from Pitcher's. Pitcher himself rejects his version of the argument as invalid, though I believe that the version I have presented avoids his objections.