不可能世界論
1. Impossible worldIn philosophical logic, the concept of an impossible world (sometimes non-normal world) is used to model certain phenomena that cannot be adequately handled using ordinary possible worlds. An impossible world, w, is the same sort of thing as a possible world (whatever that may be), except that it is in some sense "impossible. " Depending on the context, this may mean that some contradictions are true at w, that the normal laws of logic or of metaphysics fail to hold at w, or both.
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Read “不可能世界論” on Japanese Wikipedia
Read “Impossible world” on DBpedia
Read “Impossible world” on English Wikipedia
Read “不可能世界論” on Japanese Wikipedia
Read “Impossible world” on DBpedia
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