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    Proof-theoretic validity, as developed by Prawitz and Dum... — Carmelics
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    Challenges→When logic is understood proof-theoretically rather than model-theoretically, the validity problem coincides with derivability

    Proof-theoretic validity, as developed by Prawitz and Dummett, is defined via validity of proofs in all possible extensions, not mere derivability from axioms.

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    When logic is understood proof-theoretically rather than model-theoretically, th...

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