possible worlds

Possible Worlds may refer to:Possible Worlds (play), by John MightonPossible Worlds (film), by Robert Lepage, based on the Mighton playPossible Worlds (poetry book), by Peter PorterPossible Worlds (book), by J. B. S. Haldane
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In philosophy and logic, the concept of possible worlds is used to express modal claims. In philosophy, the term "modality" covers such notions as "possibility", "necessity", and "contingency". Talk of possible worlds is very widespread in contemporary philosophical discourse (especially in the English-speaking world), though much about them is disputed.
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