On the acceptability of arguments in preference-based argumentation

  • Authors:
  • Leila Amgoud;Claudette Cayrol

  • Affiliations:
  • Institut de Recherche en Informatique de Toulouse, Université Paul Sabatier, Toulouse Cedex, France;Institut de Recherche en Informatique de Toulouse, Université Paul Sabatier, Toulouse Cedex, France

  • Venue:
  • UAI'98 Proceedings of the Fourteenth conference on Uncertainty in artificial intelligence
  • Year:
  • 1998

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Abstract

Argumentation is a promising model for reasoning with uncertain and inconsistent knowledge. The key concept of acceptability enables to differentiate arguments and defeaters: The certainty of a proposition can then be evaluated through the most acceptable arguments for that proposition. In this paper, we investigate different complementary points of view: an acceptability based on the existence of direct defeaters and an acceptability based on the existence of defenders. Pursuing previous work on preference-based argumentation principles, we enforce both points of view by taking into account preference orderings for comparing arguments. Our approach is illustrated in the context of reasoning with stratified knowledge bases.