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A semantics for modal calculi. (English) Zbl 0721.03009

Our approach to a construction of semantics for modal calculi consists in the interpretation of modal statements in terms of necessary and possible truth as well as in terms of necessary and possible falsity. It supposes also some actual (ontological) and logical necessity, chance and possibility. In this paper we give semantics for a number of calculi of actual and logical modalities.

MSC:

03B45 Modal logic (including the logic of norms)
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