Why Defeasible Deontic Logic needs a Multi Preference Semantics (bibtex)
by Yao-Hua Tan, Leendert W. N. van der Torre
Abstract:
There is a fundamental difference between a conditional obligation being violated by a fact, and a conditional obligation being overridden by another conditional obligation. In this paper we propose a multi preference semantics for a defeasible deontic logic that is based on this fundamental difference. The semantics contains one preference relation for ideality, which can be used to formalize deontic `paradoxes' like the Chisholm and Forrester `Paradoxes', and another preference relation for normality, which can be used to formalize exceptions. The interference of the two preference orderings generates new questions about preferential semantics.
Reference:
Why Defeasible Deontic Logic needs a Multi Preference Semantics (Yao-Hua Tan, Leendert W. N. van der Torre), In ECSQARU, 1995.
Bibtex Entry:
@InProceedings{Tan1995,
  Title                    = {Why Defeasible Deontic Logic needs a Multi Preference Semantics},
  Author                   = {Yao-Hua Tan and Leendert W. N. van der Torre},
  Booktitle                = {ECSQARU},
  Year                     = {1995},
  Pages                    = {412-419},

  Abstract                 = {There is a fundamental difference between a conditional obligation being violated by a fact, and a conditional obligation being overridden by another conditional obligation. In this paper we propose a multi preference semantics for a defeasible deontic logic that is based on this fundamental difference. The semantics contains one preference relation for ideality, which can be used to formalize deontic `paradoxes' like the Chisholm and Forrester `Paradoxes', and another preference relation for normality, which can be used to formalize exceptions. The interference of the two preference orderings generates new questions about preferential semantics. },
  Bibsource                = {DBLP, http://dblp.uni-trier.de},
  Crossref                 = {DBLP:conf/ecsqaru/1995},
  Ee                       = {http://dx.doi.org/10.1007/3-540-60112-0_47},
  Timestamp                = {2013.07.26},
  Url                      = {http://icr.uni.lu/leonvandertorre/papers/ecsqaru95.ps.Z}
}
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