Modal logic is a kind of logic used to represent statements about necessity and possibility. In philosophy and related fields it is used as a tool for understanding concepts such as …

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 …

It begins with the simplest quanti-ed modal logic, which combines classical quanti cation theory and the classical modal axioms (and adds the Barcan formula). This logic is then compared …

What does it mean for a formula to be true? There are two approaches to showing that a formula is true: Syntactically and Semantically. We will begin with semantics. Note, we desire a way of …

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 …

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

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 …

Modal Logic: A Contemporary View. Modal notions go beyond the merely true or false by embedding what we say or think in a larger conceptual space referring to what might be or …

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 …

Modal logic is the logic of necessity, possibility and other related notions. We introduce two new sentential operators and ☐, to be understood as ‘Possibly’ and ‘Necessarily’ respectively.