Accessibility relation is a binary relation R between possible worlds which has very powerful uses in both the formal/theoretical aspects of modal logic as well as in its applications to things like epistemology, metaphysics, and value theory.

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  • Accessibility relation is a binary relation R between possible worlds which has very powerful uses in both the formal/theoretical aspects of modal logic as well as in its applications to things like epistemology, metaphysics, and value theory. In informal terms, it is the notion that modal statements (it is possible that x, it is necessary that x) may not take the same truth value in all possible worlds, or in other words that the set of possible worlds varies depending on which possible world you are in, i.e. from any given possible world, some other possible worlds may be accessible, and others may not be. (en)
  • 可及关系是在可能世界之间的二元关系 R，它在模态逻辑的形式化/理论方面非常有用，它同样也用于知识论、形而上学和价值理论。 (zh)
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  • Accessibility relation is a binary relation R between possible worlds which has very powerful uses in both the formal/theoretical aspects of modal logic as well as in its applications to things like epistemology, metaphysics, and value theory. (en)
  • 可及关系是在可能世界之间的二元关系 R，它在模态逻辑的形式化/理论方面非常有用，它同样也用于知识论、形而上学和价值理论。 (zh)
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  • Accessibility relation (en)
  • 可及关系 (zh)
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