Journal of Philosophical Logic

, Volume 41, Issue 1, pp 237-271

First online:

Conditional Ranking Revision

Iterated Revision with Sets of Conditionals
  • Emil WeydertAffiliated withIndividual and Collective Reasoning Group (ICR), Computer Science and Communications Research Unit (CSC), University of Luxembourg Email author 

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In the context of a general framework for belief dynamics which interprets revision as doxastic constraint satisfaction, we discuss a proposal for revising quasi-probabilistic belief measures with finite sets of graded conditionals. The belief states are ranking measures with divisible values (generalizing Spohn’s epistemology), and the conditionals are interpreted as ranking constraints. The approach is inspired by the minimal information paradigm and based on the principle-guided canonical construction of a ranking model of the input conditionals. This is achieved by extending techniques known from conditional default reasoning. We give an overview of how it handles different principles for conditional and parallel revision and compare it with similar accounts.


Belief revision Ranking measures Conditionals