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The modality of a proposition is the way in which it is true or false. The most important division is between propositions true of necessity, and those true as things are: necessary as opposed to contingent propositions. Other qualifiers sometimes called modal include the tense indicators ‘It will be the case that p’ or ‘It was the case that p’, and there are affinities between the deontic indicators ‘it ought to be the case that p’ or ‘it is permissible that p’, and the logical modalities. See also modal logic.

Subjects: Philosophy.

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