Education
Peter Klein received a Bachelor at Earlham College, and a Doctor of Philosophy from Yale University.
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He is the author of Certainty: A Refutation of Skepticism (1982) and a variety of articles and reviews addressing issues in epistemology. Klein is widely known for his work on skepticism. On this view, to be justified in believing P is to possess a reason R1 to believe P, and a reason R2 to believe R1, and a reason R3...and so on, ad infinitum.
Justification is, so to speak, "turtles all the way down." He has also recently advocated a picture of knowledge according to which one can have knowledge of p even if the justification for the belief that p is essentially based on false premises.
Klein calls these "useful falsehoods".
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His most influential work, however, is on the nature of knowledge, where he has long defended the defeasibility theory. His recent work defends infinitism about justification.
