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Contingency logics and propositional quantification



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PIZZI, C. Contingency logics and propositional quantification. Manuscrito: Revista Internacional de Filosofia, Campinas, SP, v. 22, n. 2, p. 283–303, 1999. Disponível em: Acesso em: 2 abr. 2023.


The problem of defining modal operators using contingency as a primitive is discussed by assuming what Lewis and Langford call "Existence Postulate", an axiom which is formulated in the framwork of a modal language with propositional quantifiers. It is shown  that the minimal contingency logic K Δ extended with the contingential counterpart of Existence Postulate is definitionally equivalent to the deontic logic KD extended with propositional quantifiers.



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Copyright (c) 1999 Manuscrito: Revista Internacional de Filosofia


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