{
  "completed_step": "C417",
  "next_proposed_step": "C418",
  "question": "Audit Flood start and close for the unique2K person profile, first with both selected contexts fixed, then with the available three-Gear event controls. Distinguish a mixed-boundary600-year station from an entire same-boundary Flood-year translation.",
  "reason_selected_after_current_result": "The census establishes finite uniqueness. Flood records have no SP person companion, so the next useful check is the boundary where that distinction can change the result.",
  "executed": false,
  "authorization_remaining": 6,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}