"ERRATUM to AXN:0365 — A Proposed Experiment Cited as an Established Result" is a record correction by Lee Sharks, dated 2026-09-05, in the Crimson Hexagonal Archive (GOVERNANCE family). It corrects Ground 1 of The Pristine Fallacy (#856), which stated that the Reverse Turing Test (#161) "establishes" that AI-habituated writers produce text bearing machine signatures in unaided writing; #161 says of itself that it does not run the experiment but specifies it. The erratum re-reads the sentence as a specified, unrun protocol, leaves Grounds 2 and 3 untouched, states what the external literature does and does not measure, and registers the correction at the point of use per the erratum mechanism of #1554. The defect was found by an external machine reader on 2026-09-05. Canonical bytes of #856 are unchanged.