# r3-b1-35

**Claim (as registered):** The date-precision field equals 'unknown' (never any other value) on 100% of records in every complete state -- a stricter, exact-zero version of a related, more permissive ceiling claim tested elsewhere in the same project on the same underlying field.

**Proposed mechanism:** The same harvest-method fact as the dated-fraction claim above (no date column is parsed by this source's list-page enumeration method), tested here at the strict exact-zero threshold rather than a generous ceiling.

**Scope:** Source: NAMAMI (India), a state-facetted manuscript-holdings portal (holdings, not origin -- every record is held-by, not produced-by, the state). Training: 11 states with a complete portal walk (~4.22M records: Bihar, Himachal Pradesh, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Odisha, Rajasthan, Tamil Nadu, Uttar Pradesh, West Bengal). Holdout: 9 more states/union territories walked to completion after this claim was fixed (Jammu & Kashmir, Assam, Haryana, Delhi, Manipur, Puducherry, Punjab, Uttarakhand, Jharkhand), each landed as a complete, reconciled count before testing. All data comes from one portal, so survival across states shows stability within this portal's own cataloguing practice, not independently of it.

**Training-side evidence:** Exactly zero non-'unknown' records across all ~4.22M complete-state records in all 11 states. A small number of date-precision-populated records observed elsewhere in the full national dataset were traced to two states entirely outside these 11 training states.

**Holdout test and outcome:** Tested (with the same detail-enrichment-pilot exclusion filter described above) across all nine India holdout states/UTs; zero exceptions found.

**Status:** Survived every tested holdout state (exact-zero integrity check).
