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5183 | Only tautologies can be certain; other propositions can only be probable [Ayer] |
Full Idea: No proposition, other than a tautology, can possibly be anything more than a probable hypothesis. | |
From: A.J. Ayer (Language,Truth and Logic [1936], Ch.1) | |
A reaction: A nice clear empiricist rejection of all attempts to assert necessary truths about nature. This also seems to be a rejection of empiricist foundationalism. A problem case seems to be introspective observations, which seem irrefutable and obvious. |