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?