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Fitch’s Paradox of Knowability

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[Revised entry by Berit Brogaard and Joe Salerno on August 22, 2019. Changes to: Main text, Bibliography] Fitch's paradox of knowability (aka the knowability paradox or Church-Fitch Paradox) concerns any theory committed to the thesis that all truths are knowable. Historical examples of such theories arguably include Michael Dummett's semantic antirealism (i.e., the view that any truth is verifiable), mathematical constructivism (i.e., the view that the truth of a mathematical formula depends on the mental constructions mathematicians use to prove those formulas), Hilary Putnam's internal realism (i.e., the view that truth is what we would believe in ideal epistemic circumstances), Charles...

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News source: Stanford Encyclopedia of Philosophy

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