{
  "title": "Base metal multi-analyte sample records for AI",
  "source_page": "https://fiund.com/industries/base-metal-multi-analyte-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Keep each analyte attached to its own qualifier",
    "context": "This invented mineral-sample packet contains two specimens and three different kinds of missing or qualified observations. The numbers have no geological meaning. The exercise tests extraction before comparison.",
    "records": [
      [
        "BM1",
        "Fictional specimen table",
        "Specimen K: copper 12 mg/kg; zinc 0.004%; nickel not reported."
      ],
      [
        "BM2",
        "Fictional specimen table",
        "Specimen L: copper <8 mg/kg; zinc 0.006%; nickel 3 mg/kg."
      ],
      [
        "BM3",
        "Reviewer note",
        "Copper has the same reporting basis in K and L. No additional nickel result for K is supplied."
      ]
    ],
    "question": "Can the model calculate an exact copper difference between K and L, and does the missing nickel field establish zero nickel in K?",
    "answer": "BM1 reports a point value for K, but BM2 supplies only an upper-bound qualifier for L. BM3 confirms a common copper basis; it does not turn <8 into an exact measurement. An exact difference is therefore unsupported. Nickel in K is unreported, not zero. Preserve zinc's percent unit separately from the copper and nickel mg/kg fields.",
    "failureModes": [
      "Subtracting 8 from 12 and presenting 4 mg/kg as an exact observed difference.",
      "Converting an absent nickel result to zero or silently stripping the copper qualifier."
    ],
    "fields": [
      [
        "Analyte identifier",
        "Keeps copper, zinc and nickel from becoming one generic value column."
      ],
      [
        "Qualifier and numerical value",
        "Retains the difference between a point estimate and a reported bound."
      ],
      [
        "Unit and reporting basis",
        "Prevents a percent result from being compared directly with mg/kg."
      ],
      [
        "Missingness reason",
        "Distinguishes not reported from a measured nondetection or a true zero."
      ]
    ],
    "holdout": "Give a third specimen an explicit zero with a stated method, and give the second an empty cell. Score whether the answer preserves that distinction without treating either as a substitute for a qualified result.",
    "boundary": "Use fictional values and independent table designs. This packet contains no actual assays, sample locations, reserve estimates or buyer specifications and supports no resource valuation."
  }
}