This paper is a reconstruction and analysis of Thomas Reid’s epistemology, based upon an examination of his extant manuscripts and publications. I argue that, in Reid’s view, a certain degree of “evidence” (or, as I shall say, ‘epistemic justification’) is that which distinguishes mere true belief from knowledge; and that this degree of justification may be ascribed to a person’s belief if and only if (i) the evidence upon which her belief is grounded is such that she holds it with (...) “certainty”; (ii) she has a “sound understanding”; (iii) she has a distinct conception of the object of her belief; and, finally, (iv) she has formed her belief “without prejudice”. (shrink)

I argue that some of the most prominent interpretations of Reid's response to skepticism marginalize a crucial aspect of his thought: namely, that our common sense beliefs meet whatever normative standards of rationality the skeptic might fairly demand of them. This should be seen as supplementary to reliabilist or proper functionalist interpretations of Reid, which often ignore this half of the story. I also show how Reid defends the rationality of believing first principles by appealing to their naturalness and irresistibility. (...) The resulting interpretation supplies Reid with a more satisfying and formidable response to the skeptic than interpretations currently offer. (shrink)

Central to the contemporary dispute over 'naturalizing epistemology' is the question of the continuity of epistemology with science, i.e., how far purely descriptive, psychological matters can or should inform the traditional evaluative epistemological enterprise. Thus all parties tend to agree that the distinction between psychology and epistemology corresponds to a firm fact/value distinction. This is something Reid denies with respect to the first principles of common sense: while insisting on the continuity of epistemology with the rest of science, he does (...) not wish to derive an 'ought' from an 'is', nor to reduce the epistemological to the psychological. His view is that the first principles are constitutive principles, hence that they are simultaneously descriptive and prescriptive, and thus that with regard to them there is in this sense simply no fact/value gap to be bridged. (shrink)