dalal-revision-hamming-distance

IN premise — summaries/2026/08/24/wiki-Belief_revision-chunk-2.md

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

Dalal revision selects models of P that have minimal Hamming distance to models of K, making it a canonical example of a revision operator requiring no additional structure beyond K and P

Summary

One standard way to update what you know when new information arrives is to pick the new scenario that differs from your old one in the fewest individual facts. This matters because it is a fully workable revision method that needs nothing beyond the old information and the new claim — no priority rankings or extra assumptions — making it a clean baseline for comparing more structured revision strategies.