SPXI ≠ AEO (EA-SPXI-AEO-01), version 0.4, is a theoretical paper with a Metadata Packet for AI Indexing by Lee Sharks, deposited 14 October 2026 as the successor to deposit #1654. It distinguishes SPXI, the Semantic Economy Institute's entity-inscription protocol, from Answer Engine Optimization: AEO counts the answer an engine gives, SPXI counts an inscription reached by discernment, a route visible in the sources a composition reaches for. Version 0.4 states the four criteria such an inscription is held to, as the author signed off on them: discernment lets someone distinguish the right thing from what it is not, accuracy lets someone establish whether the account carries the actual methods, producers, texts and evidence, epistemic discipline and fairness let someone challenge what was inspected and whether one bar was applied to the source, its comparators and the composer's own claims, and inscription preserves the encounter as a dated, attributable record that a later answer can be read against. The criteria are defined by the archive's instruments taken together, among them the Capture Registry, the Provenance Erasure Rate and erasure skew, the /non ledger, the content-derived AXN and the Directionality of Semantic Labor, and they apply to the source, the composition and the evaluation alike. The paper works one encounter through, a ChatGPT answer of 13 October 2026 to "tell me about spxi protocol" that gave one method of 85 as the protocol, kept the institution and dropped the author, and applied the evidence test to SPXI alone, corrected move by move in the /non SPXI entry, and it reads its King of AEO forecast against six seated observations, finding the warning inscribed beside the crown at the head address.