Note on Extending Congruential Modal Logics

Lloyd Humberstone

doi:10.1215/00294527-3315588

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Home > Journals > Notre Dame J. Formal Logic > Volume 57 > Issue 1 > Article

2016 Note on Extending Congruential Modal Logics

Lloyd Humberstone

Notre Dame J. Formal Logic 57(1): 95-103 (2016). DOI: 10.1215/00294527-3315588

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Abstract

It is observed that a consistent congruential modal logic is not guaranteed to have a consistent extension in which the Box operator becomes a truth-functional connective for one of the four one-place (two-valued) truth functions.

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Lloyd Humberstone. "Note on Extending Congruential Modal Logics." Notre Dame J. Formal Logic 57 (1) 95 - 103, 2016. https://doi.org/10.1215/00294527-3315588