Abstract
Epistemological foundationalism can be generally characterized as the thesis that in order for there to be any genuine knowledge at all, there must be some self-authenticating instances of knowledge which epistemically ground the whole edifice. This position can be seen to involve three distinct claims: there are self-authenticating, noninferential pieces of knowledge; these privileged instances can be infallibly recognized as such so as to be able to function in grounding other knowledge claims; and without some such instances functioning in this way, knowledge would have no foundation and skepticism would ensue. Although adherents of this ideal run the gamut from Aristotle to Husserl, it is usually identified with the epistemological problematic introduced by Descartes and Locke. The particular formulations of this general ideal differ to the extent that the self-authenticating instances are recognized as being sense-data, phenomenological essences, or intellectual principles.