Intuitionistic Logic is a Connexive Logic

Studia Logica 112 (1):95-139 (2023)
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Abstract

We show that intuitionistic logic is deductively equivalent to Connexive Heyting Logic ($$\textrm{CHL}$$ CHL ), hereby introduced as an example of a strongly connexive logic with an intuitive semantics. We use the reverse algebraisation paradigm: $$\textrm{CHL}$$ CHL is presented as the assertional logic of a point regular variety (whose structure theory is examined in detail) that turns out to be term equivalent to the variety of Heyting algebras. We provide Hilbert-style and Gentzen-style proof systems for $$\textrm{CHL}$$ CHL ; moreover, we suggest a possible computational interpretation of its connexive conditional, and we revisit Kapsner’s idea of superconnexivity.

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Citations of this work

Connexive Implications in Substructural Logics.Davide Fazio & Gavin St John - forthcoming - Review of Symbolic Logic:1-32.
On the Provable Contradictions of the Connexive Logics C and C3.Satoru Niki & Heinrich Wansing - 2023 - Journal of Philosophical Logic 52 (5):1355-1383.

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