autoepistemic-logic-non-monotonicity-mechanism

IN premise — summaries/2026/08/24/wiki-Non-monotonic_logic.md

Created 2026-08-24T17:11:19+00:00

Autoepistemic logic is non-monotonic because it contains formulae expressing 'not known'; learning a new fact removes the corresponding 'not-known' formula, so addition of knowledge causes removal of conclusions.

Summary

In this system, knowing something new can actually un-derive conclusions it previously held, because the logic tracks what is "not known" and a new fact erases that tracking. This means the system's set of conclusions is not just a growing pile; it can shrink when fresh information arrives, so downstream reasoning must be prepared for earlier results to disappear.