Modal logic differs from other kinds of logic in that it uses modal operators such as and . The former is conventionally read aloud as "necessarily", and can be used to represent notions such as moral or …

Feb 29, 2000 · Modal logic is, strictly speaking, the study of the deductive behavior of the expressions ‘it is necessary that’ and ‘it is possible that’. However, the term ‘modal logic’ may be used more broadly …

Dynamic logics resemble infinitary fixed-point extensions of classical logic, but with a modal stamp: like the basic modal logic, they are bisimulation-invariant and decidable, forming a core calculus for …

Modal logic is the logic of necessity and possibility, and by extension of analogously paired notions like validity and consistency, obligation and permission, the known and the not-ruled-out.

Modal logic, formal systems incorporating modalities such as necessity, possibility, impossibility, contingency, strict implication, and certain other closely related concepts.

Modal logic allows us to talk not just about what is true, but about what could be true or must be true under certain conditions. One way to think of modal logic is to imagine multiple "possible worlds." - …

We will begin our study of modal logic with a basic system called K in honor of the famous logician Saul Kripke. K serves as the foundation for a whole family of systems. Each member of the family results …

Modal logic helps lawyers and lawmakers understand and interpret the difference between what’s legally possible and what’s legally necessary. In personal decision-making, it guides us through options and …

Similar to first-order logic, Modal Logic can be seen as an extension to propositional logic found useful in philosophy and linguistics. The language of basic modal logic is given by the following grammar:

Traditionally, the modes implicit in modal logic are the modes of truth and ultimately the modes of being: necessary, possible, impossible, and contingent.