Selective Revision by Deductive Argumentation

The

success

postulate of classic belief revision theory demands that after revising some beliefs with by information the new information is believed. However, this form of

prioritized

belief revision is not apt under many circumstances. Research in

non-prioritized

belief revision investigates forms of belief revision where

success

is not a desirable property. Herein,

selective revision

uses a two step approach, first applying a transformation function to decide if and which part of the new information shall be accepted, and second, incorporating the result using a prioritized revision operator. In this paper, we implement a transformation function by employing deductive argumentation to assess the value of new information. Hereby we obtain a non-prioritized revision operator that only accepts new information if believing in the information is justifiable with respect to the beliefs. By making use of previous results on selective revision we prove that our revision operator satisfies several desirable properties. We illustrate the use of the revision operator by means of examples and compare it with related work.