In the ancient contest between rival cities, a single goal has become a mirror held up to the limits of human and technological judgment alike. Manchester City's 1-0 derby victory over United was confirmed by a VAR system that, it later emerged, had overlooked a critical detail in the laws of the game — the offside position of a teammate whose involvement changed everything. The refereeing body's swift acknowledgment of the error, and the removal of the two officials responsible, reflects a sport grappling with a question as old as judgment itself: who watches the watchers, and what is owed wh