What Was Actually Pre-Existing: The worker has a documented, managed history of migraines — a common, non-disabling condition that, until January 12, 2026, had been successfully controlled. The worker also has heightened sensory sensitivity consistent with his autistic neurological profile. Neither of these conditions had resulted in a single sick day due to a work-related injury in 25 years of heavy industry service. What Was NOT Pre-Existing: The Advisor characterizes the worker's PTSD and the associated psychological deterioration as pre-existing. This is factually incorrect and clinically significant. The PTSD and the sensory-induced meltdown documented from February 2026 onward were direct psychological sequelae of the workplace acoustic injury — they were caused by the sustained, unmitigated 328 Hz resonance exposure and the subsequent autistic nervous system overload. They did not exist before January 12, 2026. Characterizing them as "pre-existing and non-occupational" is not a clinical finding — it is an administrative maneuver identical to what was deployed in the ruptured eardrum case (A1802828): weaponizing the worker's biological profile to absorb the liability that belongs to the engineering failure. The Advisor selectively deployed migraine history while simultaneously ignoring the worker's autistic neurological profile as explanatory context for the severity of the response. She used one pre-existing condition as a scapegoat while suppressing the other as inconvenient. SECTION III: CHRONOLOGICAL SANITIZATION — THE SMOKING GUN The most damaging finding in this case is not the clinical opinion itself. It is what the Freedom of Information process revealed about how that opinion was constructed. To justify treating an unshielded modern server fan array in an occupied classroom as a safe environment equivalent to a quiet office, the Advisor required historical benchmarks that minimized the hazard. Through FIPPA Request WCB-2026-0484, the internal advisor processing logs were obtained. They reveal two source documents at the foundation of the denial: