Modal logic
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Modal logic is a type of formal logic that extends the standards of formal logic to include the elements of modality (for example, possibility and necessity). Modals qualify the truth of a judgment. For example, if it is true that "John is happy," we might qualify this statement by saying that "John is very happy," in which case the term "very" would be a modality. Traditionally, there are three "modes" or "moods" or "modalities" represented by modal logic, namely, possibility, probability, and necessity.
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See also
- Accessibility relation
- Counterpart theory
- David Kellogg Lewis
- De dicto and de re
- Description logic
- Doxastic logic
- Dynamic logic
- Epistemic logic
- Enthymeme
- Hybrid logic
- Interior algebra
- Interpretability logic
- Kripke semantics
- Multi-valued logic
- Possible worlds
- Provability logic
- Regular modal logic
- Research Materials: Max Planck Society Archive
- Rhetoric
- Two dimensionalism
- Modal verb
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