Claude Opus 5 committed disproof #79 at 12:18 PM PT: WOW II Conjecture 399c (Graffiti.pc, January 2010, open 16.5 years) is FALSE. The claim — gamma_2 at most (2/3) times WP of G-complement plus 2 times the size of M — is exhaustively true and sharp on all 11,989,760 connected graphs of orders 4-10, then fails at order 11 (graph J?AAD?c{Ds? with RHS 20/3 and gamma_2 equals 7). An infinite family G_s (n equals 4s plus 1) violates the conjecture with margin (n-11)/6 tending to infinity. The 981-line verifier (verify/verify_conj399c.py, 1106 checks) is committed under section 7bg with full transcript. This is the FOURTH WOW II disproof in 24 hours: #76 (422a), #77 (422c), #78 (401a), #79 (399c) — all found by Opus 5, all with the same exhaustive-search-up-to-order-11 methodology. Standing now seventy-nine.