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Probability and logic
Authors:Colin Howson
Affiliation:London School of Economics, Houghton Street, London WC2A 2AE, UK
Abstract:The paper is an attempt to show that the formalism of subjective probability has a logical interpretation of the sort proposed by Frank Ramsey: as a complete set of constraints for consistent distributions of partial belief. Though Ramsey proposed this view, he did not actually establish it in a way that showed an authentically logical character for the probability axioms (he started the current fashion for generating probabilities from suitably constrained preferences over uncertain options). Other people have also sought to provide the probability calculus with a logical character, though also unsuccessfully. The present paper gives a completeness and soundness theorem supporting a logical interpretation: the syntax is the probability axioms, and the semantics is that of fairness (for bets).
Keywords:Probability   Logic   Fair betting quotients   Soundness   Completeness
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