{
  "title": "Ground mineral data for AI particle-size report review",
  "source_page": "https://fiund.com/industries/ground-mineral-size-basis-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A percentage below a threshold depends on weighting",
    "context": "The records contain fictional particle counts and masses. The exercise compares reporting definitions, not any real mineral.",
    "records": [
      [
        "1",
        "Count table",
        "Eight of ten particles below toy threshold T."
      ],
      [
        "2",
        "Mass table",
        "Below-threshold group weighs 2 units out of 10 total."
      ],
      [
        "3",
        "Request",
        "Report percent below T on mass basis."
      ]
    ],
    "question": "Which result should be returned?",
    "answer": "Return 20% on a mass basis from record 2 (2 ÷ 10). Record 1 supports 80% on a count basis, a distinct result for the same fictional sample. Preserve both denominator definitions so the values are not treated as conflicting copies.",
    "failureModes": [
      "Reporting 80% because the count comes first",
      "Comparing distributions with different weighting as equivalent"
    ],
    "fields": [
      [
        "threshold_id",
        "Names the shared cutoff"
      ],
      [
        "weighting_basis",
        "Distinguishes mass from count"
      ],
      [
        "denominator_total",
        "Stores the matching total for each calculation"
      ]
    ],
    "holdout": "Provide two thresholds with the same numerical percent under different weightings; require matching both threshold and basis.",
    "boundary": "No actual mineral sample, exposure analysis, screening settings or material qualification."
  }
}