1. Deontic logicDeontic logic is the field of logic that is concerned with obligation, permission, and related concepts. Alternatively, a deontic logic is a formal system that attempts to capture the essential logical features of these concepts. Typically, a deontic logic uses OA to mean it is obligatory that A, (or it ought to be that A), and PA to mean it is permitted (or permissible) that A. The term deontic is derived from the ancient Greek déon - δέον, meaning, roughly, that which is binding or proper.
Read “Deontic logic” on English Wikipedia
Read “義務論理” on Japanese Wikipedia
Read “Deontic logic” on DBpedia
Read “Deontic logic” on English Wikipedia
Read “義務論理” on Japanese Wikipedia
Read “Deontic logic” on DBpedia
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