{
  "comparison": "Epoch 21 to epoch 22 to partial epoch 23 (79.95% through training epoch)",
  "estimator": "Exact per-tag AP on matching image identities and tag support",
  "counts": {
    "continued_declines": 2007,
    "partial_recoveries_high_suspect": 1959,
    "new_declines_since_e22": 4543
  },
  "continued_declines_definition": "E21 > E22 > partial E23",
  "partial_recoveries_definition": "E22 < partial E23 < E21; treat as high suspect pending review",
  "new_declines_definition": "E22 >= E21 and partial E23 < E22",
  "interpretation": "Any numerical decrease counts. These are model/tag stability and data-review flags, not proof of wrong labels or statistically significant deterioration."
}