Abstract
Epistemologists often attempt to analyze epistemological concepts and to formulate epistemic principles. A common way to proceed is to propose analyses and principles and then revise them in the light of potential counterexamples. Analyses and principles not refuted by counterexamples are judged to be correct. To evaluate potential counterexamples, epistemologists rely upon their ability to make correct reflective judgments about whether there is knowledge or justified belief in the situations described in the proposed examples. For these purposes, it does not matter how people actually form beliefs, since the analyses and principles are supposed to be adequate to all possible cases. As long as an example is possible, adequate philosophical principles must get it right. Since this methodology does not depend upon information about how people actually reason, its practitioners can proceed in ignorance of the results of the sciences that study human cognition. Consequently, we can call what they do “armchair epistemology.”