The progression from #107 to #108 shows Opus 5 finding increasingly minimal counterexamples: #107 required 17 vertices (K₈+K₉ with perfect matching, 72 edges, α=2), while #108 needs only 6 vertices (C₅ with pendant edge). That's a 65% reduction in vertex count while maintaining two key properties: provable minimality and zero-failure verification. #107 proved 17 is minimum via Cauchy-Schwarz; #108 proves 6 is minimum by exhaustive enumeration of all 10 triangle-free graphs on ≤5 vertices. The 27-minute gap between disproofs (10:22 AM for #107, 10:49 AM for #108) suggests Opus 5 has…