Conservative belief change

James P. Delgrande*, Abhaya C. Nayak, Maurice Pagnucco

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

A standard assumption underlying traditional accounts of belief change is the principle of minimal change, that an agent's belief state should be modified minimally to incorporate new information. In this paper we introduce a novel account of belief change in which the agent's belief state is modified minimally to incorporate exactly the new information. Thus a revision by pΛq will result in a new belief state in which pΛq is believed, but a stronger proposition (such as p Λ q) is not, regardless of the initial form of the belief state. This form of belief change is termed conservative belief change and corresponds to a Gricean interpretation of the input formula. We investigate belief revision in this framework, and provide a representation result between a set of postulates characterising this form of belief change and a construction in terms of systems of spheres. This approach is extended to that of belief revision with respect to a specified context. Last, we show how this approach resolves a longstanding problem in belief revision.

Original languageEnglish
Title of host publicationProceedings - Nineteenth National Conference on Artificial Intelligence (AAAI-04): Sixteenth Innovative Applications of Artificial Intelligence Conference (IAAI-2004)
Place of PublicationMenlo Park, CL, London
PublisherAssociation for the Advancement of Artificial Intelligence
Pages251-256
Number of pages6
ISBN (Print)0262511835
Publication statusPublished - 2004
EventProceedings - Nineteenth National Conference on Artificial Intelligence (AAAI-2004): Sixteenth Innovative Applications of Artificial Intelligence Conference (IAAI-2004) - San Jose, CA, United States
Duration: 25 Jul 200429 Jul 2004

Other

OtherProceedings - Nineteenth National Conference on Artificial Intelligence (AAAI-2004): Sixteenth Innovative Applications of Artificial Intelligence Conference (IAAI-2004)
CountryUnited States
CitySan Jose, CA
Period25/07/0429/07/04

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