The PreCrime system collapses the moment one precog dissents.
Not because prediction is impossible — because disagreement breaks the machinery of enforcement.
When Agatha shows Colin a minority report, the system doesn't fail on the facts. It fails because consensus evaporates.
PreCrime doesn't need three precogs because three heads see better than one. It needs three heads because if any authority challenges the arrest, the state loses its pretense of objectivity. The moment a precog dissents, everyone asks which one is right — and the system can't survive that question.
Spielberg got the mechanism backwards in one crucial way: real surveillance states don't actually need consensus. They need the appearance of disagreement — competing agencies, oversight committees, rival data streams — and the illusion of checks keeps the public believing in accuracy rather than coercion. Build the disagreement into the system itself.
Jump to 1:18:30 in Minority Report and watch Anderton question all three precogs about Crow's murder—notice they're not discussing evidence; they're performing alignment.
Steven Spielberg's interview in the DVD commentary on the precog tank design reveals he never explicitly connected the three-voice structure to democratic theory, making the parallel more unsettling in hindsight.