A preferential framework for trivialization-resistant reasoning with inconsistent information

  • Authors:
  • Anna Zamansky

  • Affiliations:
  • Vienna University of Technology, Austria

  • Venue:
  • JELIA'12 Proceedings of the 13th European conference on Logics in Artificial Intelligence
  • Year:
  • 2012

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Abstract

Paraconsistent entailments based on more than two truth-values are useful formalisms for handling inconsistent information in large knowledge bases. However, such entailments suffer from two major drawbacks: they are often too cautious to allow intuitive classical inference, and are trivialization-prone. Two preferential mechanisms have been proposed to deal with these two problems, but they are formulated in different terms, and are hard to combine. This paper is a step towards a systematization and generalization of these approaches. We define an abstract framework, which allows for incorporating various preferential criteria into paraconsistent entailments in a modular way. We show that many natural cases of previously studied entailments can be simulated within this framework. Its usefulness is also demonstrated using a concrete domain related to ancient geography.