If robots.txt disallows GPTBot, ChatGPT's live browsing/citation features cannot access this page at all - every other AEO/GEO signal becomes moot.
Impact is importance multiplied by the confidence tier’s weight — SPECIFICATION 1.0, RESEARCH 0.7, EMERGING 0.3, EXPERIMENTAL 0.1. Two rules backed by the same class of evidence therefore always carry the same weight, which is what makes the score reproducible rather than hand-tuned.