Reason-based Deontic Logic

Alessandro Giordani*

*Corresponding author

Research output: Chapter in Book/Report/Conference proceedingChapter


This paper introduces a system of deontic logic based on the idea that obligations are grounded on reasons. A reason-based deontic system is worth considering for at least three reasons: it may shed light on the way in which obligations are generated; it allows us to cope with conflicts between reasons while avoiding conflicts between obligations; finally, it may help us to assess the question as to whether standard deontic logic is appropriate to model basic deontic reasoning. The system I propose is developed in a framework that combines standard and neighborhood semantics and it is proved to be sufficiently powerful to represent ordinary deontic reasoning and to successfully address some significant problems in deontic logic.
Original languageEnglish
Title of host publicationDeontic Logic and Normative Systems
EditorsMarra A., Portner, P. and Van De Putte, F. Fenrong L.
Number of pages18
Publication statusPublished - 2021


  • all things considered obligations
  • deontic logic
  • practical reasons
  • pro tanto obligations


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