Abstract
The Principal Principle (PP) says that,for any proposition A, given any admissible evidenceand the proposition that the chance of A is x%,one's conditional credence in A should be x%. HumeanSupervenience (HS) claims that, among possible worldslike ours, no two differ without differing inthe spacetime-point-by-spacetime-point arrangement oflocal properties. David Lewis (1986b, 1994a)has argued that PP contradicts HS, and thevalidity of his argument has been endorsed byBigelow et al. (1993),Thau (1994),Hall (1994),Strevens (1995),Ismael (1996),Hoefer (1997), and Black (1998).Against this consensus, I argue thatPP might not contradict HS: Lewis'sargument is invalid, and every attempt – withina broad class of attempts – toamend the argument fails.
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Vranas, P.B.M. Who's Afraid of Undermining?. Erkenntnis 57, 151–174 (2002). https://doi.org/10.1023/A:1020986112495
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DOI: https://doi.org/10.1023/A:1020986112495