The Disappearance of Equation Fifteen, a Richard Cox Mystery

Paul Snow, USA

Halpern has retracted an earlier claim that Cox’s Theorem is deductively unsound, but he has renewed and amplified his objections to the reasonableness of the theorem for finite domains. His new argument highlights one functional equation used by Cox in 1946 but which is missing in 1978. The circumstances of its disappearance are explored, along with some of the advances in knowledge since 1946 which account for its absence.

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