{
  "executedAt": "2026-09-23T09:30:23.274Z",
  "kind": "Deterministic formula comparison; synthetic inputs, not human measurements or remote detector outputs",
  "units": "Illustrative consistent length units",
  "inputSource": "Author-designed fixtures A/B/C, not an observed population",
  "formulas": {
    "average": "L / ((F + C + J) / 3)",
    "cheekbones": "L / C",
    "difference": "averageRatio - cheekRatio",
    "relativeDifferencePercent": "(averageRatio / cheekRatio - 1) * 100"
  },
  "formulaReadingRecord": "../five-tracks/oblong-teardown-2026-09-23.md",
  "rows": [
    {
      "id": "A",
      "length": 20,
      "forehead": 13,
      "cheekbones": 14,
      "jaw": 12,
      "averageWidth": 13,
      "averageRatio": 1.5384615384615385,
      "cheekRatio": 1.4285714285714286,
      "difference": 0.10989010989010994,
      "relativeDifferencePercent": 7.692307692307687
    },
    {
      "id": "B",
      "length": 20,
      "forehead": 14,
      "cheekbones": 14,
      "jaw": 14,
      "averageWidth": 14,
      "averageRatio": 1.4285714285714286,
      "cheekRatio": 1.4285714285714286,
      "difference": 0,
      "relativeDifferencePercent": 0
    },
    {
      "id": "C",
      "length": 20,
      "forehead": 15,
      "cheekbones": 14,
      "jaw": 15,
      "averageWidth": 14.666666666666666,
      "averageRatio": 1.3636363636363638,
      "cheekRatio": 1.4285714285714286,
      "difference": -0.06493506493506485,
      "relativeDifferencePercent": -4.545454545454541
    }
  ],
  "repeat": [
    {
      "id": "A",
      "length": 20,
      "forehead": 13,
      "cheekbones": 14,
      "jaw": 12,
      "averageWidth": 13,
      "averageRatio": 1.5384615384615385,
      "cheekRatio": 1.4285714285714286,
      "difference": 0.10989010989010994,
      "relativeDifferencePercent": 7.692307692307687
    },
    {
      "id": "B",
      "length": 20,
      "forehead": 14,
      "cheekbones": 14,
      "jaw": 14,
      "averageWidth": 14,
      "averageRatio": 1.4285714285714286,
      "cheekRatio": 1.4285714285714286,
      "difference": 0,
      "relativeDifferencePercent": 0
    },
    {
      "id": "C",
      "length": 20,
      "forehead": 15,
      "cheekbones": 14,
      "jaw": 15,
      "averageWidth": 14.666666666666666,
      "averageRatio": 1.3636363636363638,
      "cheekRatio": 1.4285714285714286,
      "difference": -0.06493506493506485,
      "relativeDifferencePercent": -4.545454545454541
    }
  ],
  "repeatIdentical": true,
  "checksPassed": true,
  "scope": "Compares denominators only; does not test classification accuracy or claim a label changed."
}