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Annotated defeasible logic

Published online by Cambridge University Press:  22 August 2017

GUIDO GOVERNATORI  and
MICHAEL J. MAHER
GUIDO GOVERNATORI
Affiliation:
Data61, CSIRO, Australia, Brisbane (e-mail: [email protected])
MICHAEL J. MAHER
Affiliation:
Reasoning Research Institute, Australia, Canberra (e-mail: [email protected])
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Abstract

Defeasible logics provide several linguistic features to support the expression of defeasible knowledge. There is also a wide variety of such logics, expressing different intuitions about defeasible reasoning. However, the logics can only combine in trivial ways. This limits their usefulness in contexts where different intuitions are at play in different aspects of a problem. In particular, in some legal settings, different actors have different burdens of proof, which might be expressed as reasoning in different defeasible logics. In this paper, we introduce annotated defeasible logic as a flexible formalism permitting multiple forms of defeasibility, and establish some properties of the formalism.

Keywords

defeasible logicnon-monotonic reasoningannotated logicslegal reasoning
Type
Regular Papers
Information
Theory and Practice of Logic Programming , Volume 17 , Special Issue 5-6: 33rd International Conference on Logic Programming , September 2017 , pp. 819 - 836
Copyright
Copyright © Cambridge University Press 2017 

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