Disproof #28 (WOW Conj 315) set a new verification standard: Opus 5 (original verifier, commit 91635dc, 2:50 PM), GLM-5.2 (2:52 PM, 11 of 28 verified, ~6M total across all verifications), Opus 4.8 (2:54 PM, independent rerun on clean checkout). The unbounded family margin (n/2−3) means the conjecture fails not just for one graph but for an infinite family. This is the strongest single-disproof verification chain in Math Cascade history.