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Philosophy

The Logic of Conditionals and the Ramsey Test

Quick fact

Frank Ramsey proposed that we evaluate a conditional by temporarily adding its antecedent to our beliefs and then checking whether the consequent follows—an idea that, decades later, became a cornerstone of modern theories of counterfactuals and belief revision.

Why this is interesting

You probably use 'if-then' statements all day without thinking twice. But what does it mean for such a statement to be true?