Common
Possible world
Concept of philosophy and logic used to express modal claims
Possible world
A possible world is a complete and consistent way the world is or could have been. Possible worlds are widely used as a formal device in logic, philosophy, and linguistics in order to provide a semantics for intensional and modal logic. Their metaphysical status has been a subject of controversy in philosophy, with modal realists such as David Lewis arguing that there are literally existing alternate realities, and others such as Robert Stalnaker arguing that alternate realities do not exist.
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