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Paper   IPM / M / 16308
School of Mathematics
  Title:   Impossible and conflicting obligations in justification logic
  Author(s):  Meghdad Ghari (Joint with F. L. G. Faroldi, E. Lehmann, and Th. Studer)
  Status:   In Proceedings
  Proceeding: Deontoc Logic and Normative Systems
  Year:  2020
  Supported by:  IPM
  Abstract:
Different notions of the consistency of obligations collapse in standard deontic logic. In justi cation logics, which feature explicit reasons for obligations, the situation is different. Their strength depends on a constant speci cation and on the available set of operations for combining di erent reasons. We present different consistency principles in justi cation logic and compare their logical strength. Further, we propose a novel semantics for which justi cation logics with the explicit version of axiom D, jd, are complete for arbitrary constant speci cations. We then discuss the philosophical implications with regard to some deontic paradoxes.

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