agm-eight-postulates-names

IN premisesummaries/2026/08/24/wiki-Belief_revision-chunk-1.md

Created 2026-08-24T17:11:06+00:00

The AGM framework defines exactly eight postulates for a rational belief revision operator: Closure, Success, Inclusion, Vacuity, Consistency, Extensionality, Superexpansion, and Subexpansion

Summary

The AGM framework, which sets the standard for how a rational system should absorb new information without falling into contradiction, specifies exactly eight named rules that any valid update procedure must satisfy. This gives a finite, checkable checklist for auditing whether the system's reasoning stays coherent when its knowledge changes.