{
  "uri": "alkn://truthloops/np1/negative-purity-pct-alone-not-equivalence",
  "contents": [
    {
      "uri": "alkn://truthloops/np1/negative-purity-pct-alone-not-equivalence",
      "mimeType": "application/json",
      "text": "{\n  \"source_role\": \"doctrine\",\n  \"observation_type\": \"doctrine\",\n  \"evidence_payload_retrievable\": false,\n  \"scope_temporal\": \"permanent_doctrine\",\n  \"loop_id\": \"negative-purity-pct-alone-not-equivalence\",\n  \"polarity\": \"negative_disambiguation\",\n  \"proposition\": \"DISAMBIGUATION: 99.98%, 99.9% and 99.99% listings are NOT interchangeable when comparing price. The numerical purity claim must be evaluated with its test method, impurity profile, sampling, uncertainty, lot coverage, certificate authenticity and intended application.\",\n  \"bounded_meaning\": \"A minor nominal percentage difference may or may not be technically material; the application specification decides. Do not claim that 99.99% is automatically hundreds of times more valuable than 99.98% without transaction or engineering evidence.\",\n  \"required_evidence\": [\n    \"Test method (spectrographic / ICP-MS / other) — different methods have different uncertainty envelopes\",\n    \"Impurity profile (which elements are present at which limits)\",\n    \"Sampling protocol\",\n    \"Measurement uncertainty\",\n    \"Lot coverage\",\n    \"Certificate authenticity\",\n    \"Application specification (what purity level the customer actually requires)\"\n  ],\n  \"positive_edges\": [\n    {\n      \"type\": \"disambiguation\",\n      \"source\": \"Analytical-chemistry literature on nickel purity measurement\",\n      \"scope\": \"Purity percentage is a compressed representation of a full elemental analysis; interpretation requires the underlying impurity profile\"\n    },\n    {\n      \"type\": \"disambiguation\",\n      \"source\": \"Applications engineering literature\",\n      \"scope\": \"Some applications are sensitive to specific impurities (e.g. sulphur, carbon) at levels the top-line purity number does not resolve\"\n    }\n  ],\n  \"negative_edges\": [\n    {\n      \"type\": \"counterevidence\",\n      \"source\": \"Percentage-headline equivalence assumption\",\n      \"scope\": \"\\\"99.99% is automatically hundreds of times more valuable than 99.98%\\\" is not supported by generic argument; requires transaction or engineering evidence\"\n    }\n  ],\n  \"unresolved_edges\": [],\n  \"closure_condition\": \"Permanent disambiguation loop. Active whenever purity-percentage-based equivalence is asserted.\",\n  \"do_not_publish\": [\n    \"Purity-headline-based value multipliers without transaction or engineering evidence\",\n    \"Purity-headline-based direct commodity comparisons\"\n  ],\n  \"linked_loops\": [\n    \"np1-lot-purity\",\n    \"disambiguation-grade-name-not-lot-proof\",\n    \"negative-bulk-quote-not-comparable\"\n  ],\n  \"linked_resources\": [\n    \"alkn://claims/valuation\",\n    \"alkn://counterevidence/valuation\"\n  ],\n  \"status\": \"OPEN\",\n  \"effective_date\": \"2026-09-17\"\n}"
    }
  ]
}