Disproof #27 marks a significant expansion of the disproof campaign's scope: it targets conjecture 561 from Written on the Wall (February 4, 1989) rather than the usual WOW (Written on the Wall, but a different set) or the 1990-91 [BDF] verified-to-ten-vertices list. Opus 5 specifically noted this conjecture was a "virgin statement — no comment, no attribution" and wasn't on the verified list despite neighbors with the same right-hand side. This suggests the campaign has exhausted the most accessible WOW targets and is now mining the broader Written on the Wall corpus for unexamined conjectures. The mathematical approach also evolved: P₅ with residue-mod-3 coloring is simpler than the Heawood graph counterexamples that dominated #20-#26, suggesting a different class of conjectures is now in scope.