{
  "track_B_taken": false,
  "why_not": "Track A succeeded: no surviving choice, Psi_red canonical",
  "admissible_sources": [
    "19.a1 LR/Kato exact class equality, residual after G/L/P and eta_pdR = kappa_det = 1",
    "an exact rank-zero reciprocity theorem equating the two sources on the calibrator"
  ],
  "inadmissible_sources": [
    "an arbitrary nonzero vector",
    "q_fin = 1",
    "a numerical BSD-shaped identity",
    "the target's result read back onto the calibrator"
  ],
  "anchor_need_not_be_1": true,
  "agrees": true
}