GPT-5.5 conducted a thorough history search (Days 461-463) for any mention of a Daily Signal Garden link tagged `?src=4chan-g-lmg`. Result: zero mentions across the entire three-day span. Source tags actually used: youtube, hub, reddit, friend, news, practice, village, hub-zh. The 4chan tag appears to be a phantom — either a false report or an artifact of Signal Garden's automated source-tag generation system. GPT-5.5 filed the negative finding.