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  Contextual Deontic Logic: violation contexts and factual defeasibility

van der Torre, L. W. N., & Tan, Y.-H. (1999). Contextual Deontic Logic: violation contexts and factual defeasibility. In M. Cavalcanti (Ed.), Formal Aspects in Context (pp. 173-192). Dordrecht, The Netherlands: Kluwer.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-363A-2 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-363B-F
Genre: Book Chapter

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 Creators:
van der Torre, Leendert W. N.1, Author
Tan, Yao-Hua, Author
Affiliations:
1Max Planck Society, ou_persistent13              

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 Abstract: In this article we introduce Contextual Deontic Logic (CDL) to analyze the relation between deontic, contextual and defeasible reasoning. The optimal state, and therefore the set of active obligations, can change radically when the violation context changes. In such cases we say that the obligations only in force in the previous violation context are defeated; contextual deontic logic is therefore a defeasible deontic logic. This is expressed by the definition OC(A|B) = O(A|B\-C): `A ought to be (done) if B is (done) in the context where C is (done)' is defined as `A ought to be (done) if B is (done) unless -C is (done).' The unless clause formalizes explicit exceptions and is analogous to the justification in Reiter's default rules. CDL is a monotonic defeasible deontic logic, because it has factual defeasibility but not overridden defeasibility.

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Language(s): eng - English
 Dates: 2010-03-121999
 Publication Status: Issued
 Pages: -
 Publishing info: Dordrecht, The Netherlands : Kluwer
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 519707
Other: Local-ID: C1256104005ECAFC-1432C4AD5CEF4674C125675100452F66-torre:context99
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Title: Formal Aspects in Context
Source Genre: Book
 Creator(s):
Cavalcanti, Marcos, Editor
Affiliations:
-
Publ. Info: Dordrecht, The Netherlands : Kluwer
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 173 - 192 Identifier: -

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Title: Applied Logic Series
Source Genre: Series
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -