Authors
Sven Ove Hansson
Royal Institute of Technology, Stockholm
Abstract
The AGM theory of belief contraction is extended tomultiple contraction, i.e. to contraction by a set of sentences rather than by a single sentence. There are two major variants: Inpackage contraction all the sentences must be removed from the belief set, whereas inchoice contraction it is sufficient that at least one of them is removed. Constructions of both types of multiple contraction are offered and axiomatically characterized. Neither package nor choice contraction can in general be reduced to contractions by single sentences; in the finite case choice contraction allows for reduction.
Keywords belief revision  belief contraction  theory change
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DOI 10.1007/BF01066356
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References found in this work BETA

Multiple Conclusion Logic.D. J. Shoesmith & Timothy Smiley - 1978 - Cambridge, England / New York London Melbourne: Cambridge University Press.
Theory Contraction Through Base Contraction.André Fuhrmann - 1991 - Journal of Philosophical Logic 20 (2):175 - 203.

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Citations of this work BETA

The Ethics of Nudge.Luc Bovens - 2008 - In Mats J. Hansson & Till Grüne-Yanoff (eds.), Preference Change: Approaches from Philosophy, Economics and Psychology. Berlin: Springer, Theory and Decision Library A. pp. 207-20.
AGM 25 Years: Twenty-Five Years of Research in Belief Change.Eduardo Fermé & Sven Ove Hansson - 2011 - Journal of Philosophical Logic 40 (2):295 - 331.

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