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Dynamics of knowledge in DeLP through Argument Theory Change

Published online by Cambridge University Press:  25 January 2012

MARTÍN O. MOGUILLANSKY ,
NICOLÁS D. ROTSTEIN ,
MARCELO A. FALAPPA ,
ALEJANDRO J. GARCÍA  and
GUILLERMO R. SIMARI
MARTÍN O. MOGUILLANSKY
Affiliation:
National Research Council (CONICET), AI R&D Lab (LIDIA), Department of Computer Science and Engineering (DCIC), Universidad Nacional del Sur (UNS), Argentina (e-mail: [email protected], [email protected], [email protected], [email protected], [email protected])
NICOLÁS D. ROTSTEIN
Affiliation:
National Research Council (CONICET), AI R&D Lab (LIDIA), Department of Computer Science and Engineering (DCIC), Universidad Nacional del Sur (UNS), Argentina (e-mail: [email protected], [email protected], [email protected], [email protected], [email protected])
MARCELO A. FALAPPA
Affiliation:
National Research Council (CONICET), AI R&D Lab (LIDIA), Department of Computer Science and Engineering (DCIC), Universidad Nacional del Sur (UNS), Argentina (e-mail: [email protected], [email protected], [email protected], [email protected], [email protected])
ALEJANDRO J. GARCÍA
Affiliation:
National Research Council (CONICET), AI R&D Lab (LIDIA), Department of Computer Science and Engineering (DCIC), Universidad Nacional del Sur (UNS), Argentina (e-mail: [email protected], [email protected], [email protected], [email protected], [email protected])
GUILLERMO R. SIMARI
Affiliation:
National Research Council (CONICET), AI R&D Lab (LIDIA), Department of Computer Science and Engineering (DCIC), Universidad Nacional del Sur (UNS), Argentina (e-mail: [email protected], [email protected], [email protected], [email protected], [email protected])
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Abstract

This article is devoted to the study of methods to change defeasible logic programs (de.l.p.s) which are the knowledge bases used by the Defeasible Logic Programming (DeLP) interpreter. DeLP is an argumentation formalism that allows to reason over potentially inconsistent de.l.p.s. Argument Theory Change (ATC) studies certain aspects of belief revision in order to make them suitable for abstract argumentation systems. In this article, abstract arguments are rendered concrete by using the particular rule-based defeasible logic adopted by DeLP. The objective of our proposal is to define prioritized argument revision operators à la ATC for de.l.p.s, in such a way that the newly inserted argument ends up undefeated after the revision, thus warranting its conclusion. In order to ensure this warrant, the de.l.p. has to be changed in concordance with a minimal change principle. To this end, we discuss different minimal change criteria that could be adopted. Finally, an algorithm is presented, implementing the argument revision operations.

Keywords

Knowledge Representation and ReasoningLogic ProgrammingBelief revisionArgumentationNon-monotonic reasoning
Type
Regular Papers
Information
Theory and Practice of Logic Programming , Volume 13 , Issue 6 , November 2013 , pp. 893 - 957
Copyright
Copyright © Cambridge University Press 2012 

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