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"mechanisms": {
"fertility_priors": {
"date": "2026-09-27",
"enabled": false,
"gold": "clear/IRVAsm",
"lambda": 2.0,
"note": "RE-MEASURED 2026-09-25 after the same subject_indexing fix (anchors 7126->4690). Whole Bible vs Clear gold (IRVAsm -- same base_text bug as ben, fixed in the original M1 run), lambda=2, --fertility-typology-fallback: now a clear LOSS, well past the noise floor -- eflomal F1 .5572->.5544 (Delta-0.0028, floor 0.0022), exact_span 14676->14396 (-280); +gloss F1 .5573->.5548 (Delta-0.0025, floor 0.0019), exact -259.5. (Pre-fix: F1 inside the noise floor both ways, Delta-0.00015/+0.00005, but exact_span already down -445/-425.5.) Same pattern as ben: the spurious finite_verb anchors were masking a real, larger loss from the possessor/dative-only signal once isolated. Still no win under either measurement. RE-MEASURED AGAIN 2026-09-27 (D4a follow-up, spa's own note above explains why): anchors 4690->7727 (definite gate now open too); asm also does NOT flip -- eflomal F1 .5572->.5550 (Delta-0.0022, right at the 0.0022 floor -- borderline, not a confident win either way), exact_span 14656->14344 (-312); +gloss F1 .5570->.5548 (Delta-0.0022), exact 14675->14386 (-289). Net: essentially the same magnitude loss as the 2026-09-25 measurement, just from a different anchor mix -- kept `enabled: false`.",
"source": "measured"
},
"spanext.typology_fallback": {
"date": "2026-09-24",
"enabled": false,
"gold": "clear/IRVAsm",
"note": "measured 2026-09-24 (whole Bible, Clear gold, WITH the identity guard): same pattern as ben, smaller scale (115 vs 258 real conflicts before the guard). Kept OFF.",
"source": "measured"
}
}
}
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