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A basic system of congruential-to-monotone bimodal logic and two of its extensions. (English) Zbl 0883.03010
Summary: If what is known need not be closed under logical consequence, then a distinction arises between something’s being known to be the case (by a specific agent) and its following from something known (to that subject). When each of these notions is represented by a sentence operator, we get a bimodal logic in which to explore the relations between the two notions.
03B45 Modal logic (including the logic of norms)
03A05 Philosophical and critical aspects of logic and foundations
Full Text: DOI
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