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- Fitchs_paradox_of_knowability abstract "Fitch's paradox of knowability is one of the fundamental puzzles of epistemic logic. It provides a challenge to the knowability thesis, which states that every truth is, in principle, knowable. The paradox is that this assumption implies the omniscience principle, which asserts that every truth is known. Essentially, Fitch's paradox asserts that the existence of an unknown truth is unknowable. So if all truths were knowable, it would follow that all truths are in fact known.The paradox is of concern for verificationist or anti-realist accounts of truth, for which the knowability thesis is very plausible, but the omniscience principle is very implausible. The paradox appeared as a minor theorem in a 1963 paper by Frederic Fitch, "A Logical Analysis of Some Value Concepts". Other than the knowability thesis, his proof makes only modest assumptions on the modal nature of knowledge and of possibility. He also generalised the proof to different modalities. It resurfaced in 1979 when W. D. Hart wrote that Fitch's proof was an "unjustly neglected logical gem".".
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- Fitchs_paradox_of_knowability wikiPageWikiLink Anti-realism.
- Fitchs_paradox_of_knowability wikiPageWikiLink Anti-realist.
- Fitchs_paradox_of_knowability wikiPageWikiLink Category:Epistemology.
- Fitchs_paradox_of_knowability wikiPageWikiLink Category:Paradoxes.
- Fitchs_paradox_of_knowability wikiPageWikiLink Conjunction_elimination.
- Fitchs_paradox_of_knowability wikiPageWikiLink Conjunction_introduction.
- Fitchs_paradox_of_knowability wikiPageWikiLink Doxastic_logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Epistemic_logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Epistemic_modal_logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Frederic_Brenton_Fitch.
- Fitchs_paradox_of_knowability wikiPageWikiLink Frederic_Fitch.
- Fitchs_paradox_of_knowability wikiPageWikiLink Gxc3xb6dels_Theorem.
- Fitchs_paradox_of_knowability wikiPageWikiLink Gxc3xb6dels_incompleteness_theorems.
- Fitchs_paradox_of_knowability wikiPageWikiLink Intuitionistic_logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Journal_of_Symbolic_Logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Knowledge.
- Fitchs_paradox_of_knowability wikiPageWikiLink Logical_conjunction.
- Fitchs_paradox_of_knowability wikiPageWikiLink Logical_truth.
- Fitchs_paradox_of_knowability wikiPageWikiLink Material_conditional.
- Fitchs_paradox_of_knowability wikiPageWikiLink Modal_logic.
- Fitchs_paradox_of_knowability wikiPageWikiLink Modal_operator.
- Fitchs_paradox_of_knowability wikiPageWikiLink Moores_paradox.
- Fitchs_paradox_of_knowability wikiPageWikiLink Paradox.
- Fitchs_paradox_of_knowability wikiPageWikiLink Reductio_ad_absurdum.
- Fitchs_paradox_of_knowability wikiPageWikiLink Rule_of_necessitation.
- Fitchs_paradox_of_knowability wikiPageWikiLink Subjunctive_possibility.
- Fitchs_paradox_of_knowability wikiPageWikiLink Tautology_(logic).
- Fitchs_paradox_of_knowability wikiPageWikiLink Theorem.
- Fitchs_paradox_of_knowability wikiPageWikiLink Verificationism.
- Fitchs_paradox_of_knowability wikiPageWikiLink Verificationist.
- Fitchs_paradox_of_knowability wikiPageWikiLink W._D._Hart.
- Fitchs_paradox_of_knowability wikiPageWikiLinkText "Fitch's paradox of knowability".
- Fitchs_paradox_of_knowability wikiPageWikiLinkText "Knowability Paradox".
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- Fitchs_paradox_of_knowability wikiPageUsesTemplate Template:Philosophical_paradoxes.
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- Fitchs_paradox_of_knowability subject Category:Epistemology.
- Fitchs_paradox_of_knowability subject Category:Paradoxes.
- Fitchs_paradox_of_knowability hypernym Puzzles.
- Fitchs_paradox_of_knowability comment "Fitch's paradox of knowability is one of the fundamental puzzles of epistemic logic. It provides a challenge to the knowability thesis, which states that every truth is, in principle, knowable. The paradox is that this assumption implies the omniscience principle, which asserts that every truth is known. Essentially, Fitch's paradox asserts that the existence of an unknown truth is unknowable.".
- Fitchs_paradox_of_knowability label "Fitch's paradox of knowability".
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- Fitchs_paradox_of_knowability sameAs Q5455413.
- Fitchs_paradox_of_knowability sameAs Q5455413.
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- Fitchs_paradox_of_knowability isPrimaryTopicOf Fitchs_paradox_of_knowability.