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  2. Alethic modality - Wikipedia

    en.wikipedia.org/wiki/Alethic_modality

    Alethic modality (from Greek ἀλήθεια = truth) is a linguistic modality that indicates modalities of truth, in particular the modalities of logical necessity, contingency, possibility and impossibility. [1] [2]

  3. Modal logic - Wikipedia

    en.wikipedia.org/wiki/Modal_logic

    The criticism states that there is no real difference between "the truth in the world" (alethic) and "the truth in an individual's mind" (epistemic). [14] An investigation has not found a single language in which alethic and epistemic modalities are formally distinguished, as by the means of a grammatical mood. [15]

  4. Subjunctive possibility - Wikipedia

    en.wikipedia.org/wiki/Subjunctive_possibility

    Subjunctive possibility (also called alethic possibility) is a form of modality studied in modal logic.Subjunctive possibilities are the sorts of possibilities considered when conceiving counterfactual situations; subjunctive modalities are modalities that bear on whether a statement might have been or could be true—such as might, could, must, possibly, necessarily, contingently, essentially ...

  5. Alethic - Wikipedia

    en.wikipedia.org/wiki/Alethic

    The adjective alethic refers to the various modalities of truth, such as necessity, possibility or impossibility, as in: Alethic modality , a modality in linguistics Subjunctive or alethic possibility , a form of modality studied in modal logic

  6. Modality (semantics) - Wikipedia

    en.wikipedia.org/wiki/Modality_(semantics)

    In classic formal approaches to linguistic modality, an utterance expressing modality is one that can always roughly be paraphrased to fit the following template: (3) According to [a set of rules, wishes, beliefs,...] it is [necessary, possible] that [the main proposition] is the case.

  7. Modal operator - Wikipedia

    en.wikipedia.org/wiki/Modal_operator

    A modal connective (or modal operator) is a logical connective for modal logic.It is an operator which forms propositions from propositions. In general, a modal operator has the "formal" property of being non-truth-functional in the following sense: The truth-value of composite formulae sometimes depend on factors other than the actual truth-value of their components.

  8. Category:Modal logic - Wikipedia

    en.wikipedia.org/wiki/Category:Modal_logic

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  9. C. I. Lewis - Wikipedia

    en.wikipedia.org/wiki/C._I._Lewis

    Lewis went on to devise modal logic which he described in his next book Symbolic Logic (1932) as possible formal analyses of the alethic modalities, modes of logical truth such as necessity, possibility and impossibility.