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belief revision
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belief revision

logic
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Quick Summary

Belief revision is a field within applied logic that uses logical techniques to study how individuals or systems update their beliefs when presented with new information. It is relevant to both epistemology and artificial intelligence.1

In belief revision, beliefs are represented as "belief sets," which are collections of propositions that are logically consistent. When new information is introduced, a belief set can undergo three types of changes:
* Expansion: Adding a new, previously undetermined proposition.
* Contraction: Making a previously accepted or rejected proposition undetermined.
* Revision: Changing the status of a proposition (e.g., from accepted to rejected).1

The goal is to develop rules for these changes that minimize alterations while maintaining logical coherence. This area of study acknowledges that reasoning is not always monotonic, meaning new information can lead to the retraction of previously held beliefs.1

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2 Britannica Sources
  1. applied logic - Belief revision
  2. logic

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