### Some articles on *propositional modal logic, modal logic, propositional, modal logics*:

Accessibility Relation - Basic Review of (Propositional) Modal Logic

... reasoning behind the 'accessibility relation' uses the basics of '

... reasoning behind the 'accessibility relation' uses the basics of '

**propositional modal logic**' (see**modal logic**for a detailed discussion) ...**Propositional modal logic**' is traditional**propositional**logic with the addition of two key unary operators Six Basic Axioms of**Modal Logic**There are at least six ... The first two hold in all regular**modal logics**, and the last holds in all normal**modal logics**...### Famous quotes containing the word logic:

“Neither Aristotelian nor Russellian rules give the exact *logic* of any expression of ordinary language; for ordinary language has no exact *logic*.”

—Sir Peter Frederick Strawson (b. 1919)

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