- deontic logic
- A logical calculus created by adding operators ‘O
*p*’ (it ought to be the case that*p*) and ‘P*p*’ (it is permissible that*p*) to a basic system such as the propositional calculus, together with rules of inference for them. A deontic logic will study inferences between these forms, telling for instance whether O*p*&*p*→*q*yield O*q*, or whether O*p*→ ¬O¬*p*. Principles such as these have proved controversial and there is no one ‘classical’ system of deontic logic. See also gentle murder, paradox of.

*Philosophy dictionary.
Academic.
2011.*

### Look at other dictionaries:

**Deontic 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… … Wikipedia**deontic logic**— Branch of modal logic that studies the permitted, the obligatory, and the forbidden, which are characterized as deontic modalities (Greek, deontos: of that which is binding ). It seeks to systematize the abstract, purely conceptual relations… … Universalium**deontic logic**— noun the modal logic of obligation and permissibility • Hypernyms: ↑modal logic … Useful english dictionary**deontic logic**— noun a) The study of obligation, permission, and related concepts. b) A formal system capturing the concepts of obligation and permission. See Also: modal logic … Wiktionary**deontic**— logic … Philosophy dictionary**deontic logics**— deontic logic … Philosophy dictionary**logic, philosophy of**— Philosophical study of the nature and scope of logic. Examples of questions raised in the philosophy of logic are: In virtue of what features of reality are the laws of logic true? ; How do we know the truths of logic? ; and Could the laws of… … Universalium**Logic**— For other uses, see Logic (disambiguation). Philosophy … Wikipedia**logic**— logicless, adj. /loj ik/, n. 1. the science that investigates the principles governing correct or reliable inference. 2. a particular method of reasoning or argumentation: We were unable to follow his logic. 3. the system or principles of… … Universalium**deontic**— de·on·tic (dē ŏnʹtĭk) adj. Of, relating to, or concerning duties or obligations: deontic logic. [Greek deon, deont , obligation, necessity. See deontology.] * * * … Universalium