{
  "title": "DeAIze local detector corpus observation, 28 September 2026",
  "date": "2026-09-28",
  "measurement_version": 2,
  "engine": "DeAIze detector (local ensemble, lite tier)",
  "source_artifact": "production data/content/measurements/latest.json, retrieved 2026-10-08",
  "passage_target_words": 140,
  "minimum_tail_words": 90,
  "threshold_pct": 30,
  "threshold_rule": "score >= 30",
  "reference": {
    "selection": "Passages from guides not marked generated in content metadata; human authorship not independently verified",
    "document_count": 61,
    "passage_count": 709,
    "mean_score_pct": 26,
    "median_score_pct": 25,
    "min_score_pct": 0,
    "max_score_pct": 69,
    "at_or_above_threshold": 239
  },
  "generated_comparison": {
    "selection": "Unedited DeepSeek model passages from fixed prompts",
    "passage_count": 12,
    "mean_score_pct": 33,
    "median_score_pct": 34,
    "min_score_pct": 4,
    "max_score_pct": 46
  },
  "limits": [
    "The stored reference group is labelled human in the original artifact; metadata selection does not independently establish authorship.",
    "709 counts passages from 61 documents, not 709 independent guides. Passages from the same document are correlated.",
    "Figures are rounded aggregate model readings. Per-passage scores and exact model revisions were not retained in the source artifact.",
    "No verified human false-positive rate, overall detector accuracy or population estimate can be derived from these figures.",
    "This is a local detector observation, not a Turnitin or other commercial detector result and not a validation of current production behavior."
  ]
}