{
  "title": "The Loop Eats Its Own Input",
  "author": "Chadwick Warner",
  "rev": "03",
  "homepage": "https://chadwick-warner.4ort.net/",
  "film": "https://4ort.mov/@chadwick_warner",
  "tags": ["model collapse", "feedback loop", "tolerance", "machine shop", "render farm", "predictive policing"],
  "grounding": [
    {"concept": "model collapse", "wikidata": "https://www.wikidata.org/wiki/Q123403903", "definition": "degradation whereby a generative model's own output re-enters training and the distribution narrows"}
  ],
  "worked_example": {
    "print_od": "0.8000 +0 / -0.0008",
    "first_article": "0.8001",
    "drift": "uniform -0.00005 per part",
    "failed_at_part": 10,
    "final_od": "0.7994",
    "status": "scrapped run",
    "note": "failure invisible because verification referenced the last pass, not the bare metal"
  },
  "thesis": "A closed feedback loop cannot audit itself; it reports its own prior belief. The remedy is an independent outside reference that the loop cannot overwrite.",
  "across_shops": [
    {"shop": "machine", "reenters": "last measurement", "drift": "bearing wear toward scrapped run"},
    {"shop": "render farm", "reenters": "own frames as reference normals", "drift": "about half a stop per generation"},
    {"shop": "patrol map", "reenters": "self-produced arrests", "drift": "hot spot thickens around where you already looked"}
  ]
}