{
  "coordinate_BC": 5436,
  "valid_roles": [
    "SP completed primary inverse cumulative Flood",
    "ordinary MT cumulative Shem",
    "MT Conquest-held cumulative inverse Shem when Flood andShem cuts both retained"
  ],
  "different_partition_Shem_BC": 4446,
  "guard": "A coordinate equality preserves each path label; the whole Conquest–Shem inverse is a separate branch."
}