memit-non-conflicting-edit-constraint

IN premise — summaries/2026/08/24/meng-2022-memit-s3-p-reliminaries-l-anguage-modeling-and-memory-editing-chunk-1.md

Created 2026-08-25T02:58:13+00:00

MEMIT's edit set E requires that no two edits share the same (subject, relation) pair with different objects, formally: ¬∃ i,j : (s_i = s_j) ∧ (r_i = r_j) ∧ (o_i ≠ o_j)

Summary

MEMIT only allows one "answer" per subject-and-relation pair, so you can't simultaneously edit that Paris is the capital of France and that Paris is the capital of Italy. This matters because it forces the system to pick a single consistent fact for each query pattern, preventing two edits from pulling the model in opposite directions on the same question.