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Forum Philosophicum

Volume 17, Issue 2, Autumn 2012

Martin Lembke
Pages 211-223
DOI: 10.5840/forphil201217214

Grim, Omniscience, and Cantor’s Theorem

Although recent evidence is somewhat ambiguous, if not confusing, Patrick Grim still seems to believe that his Cantorian argument against omniscience is sound. According to this argument, it follows by Cantor’s power set theorem that there can be no set of all truths. Hence, assuming that omniscience presupposes precisely such a set, there can be no omniscient being. Reconsidering this argument, however, guided in particular by Alvin Plantinga’s critique thereof, I find it far from convincing. Not only does it have an enormously untoward side effect, but it is self-referentially incoherent as well.