Edited by Barak Krakauer (University of California, Santa Cruz)
|Summary||Impossible worlds are structures that have been proposed to make sense of certain kinds of modal phenomena. Unlike the possible worlds, impossible worlds are incomplete, inconsistent, or both; nonetheless, impossible worlds are employed in a similar way, intended to represent or model certain kinds of scenarios. A possible worlds theorist may attempt to give an account of propositions, properties, intentional attitudes, or various flavors of necessity and possibility, yet run into trouble in "hyperintensional" contexts: she might, for example, want to distinguish properties that are necessarily co-extensive (such as triangularity and trilateraltiy) or propositions that are true in the same set of worlds (such as <2 + 2 = 4> and ). Impossible worlds could be added to such a system to make the kinds of distinctions in modal space that seem to be required, since there would be impossible worlds where a figure has three sides but not three angles, or where all bachelors are male but 2 + 2 does not equal 4. Some impossible worlds theorists hold that these structures are sui generis entities, entities of the same kind as possible worlds, or entities constructed from the possible worlds.|
|Introductions||Francesco Berto's Stanford Encyclopedia entry is a good introduction to some of the motivations for impossible worlds as well as their metaphysics.|
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