Modal Logic
Modal logic is an extension of ordinary propositional logic. Its purpose is to model our reasoning about statements that do not correspond to actual facts in the world. In general, the goa...
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Modal Logic
Traditionally, the modes implicit in modal logic are the modes of truth and ultimately the modes of being: necessary, possible, impossible, and contingent. While the study of the formal pr...
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Modality and Quantification
Quantified modal logics combine quantifiers (∀ for all, and ∃, for some) with an intensional operator □ (for such expressions as 'necessarily&#x...
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Modality, Philosophy and Metaphysics Of
Some things are true; some are false. Some are true, but might have been false. Some are true but could not have been false. Some are false, but might have been...
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Modal Logic
Modal Logic