# r3-b1-07

**Claim (as registered):** Within one manuscript catalogue's own scribe-attestation layer, the share of manuscripts with two or more recorded scribe-attestation events is a stable structural baseline (registered band [3%, 9%]) as the corpus grows.

**Proposed mechanism:** Proposed to reflect a real, stable base rate of multi-scribe or collaborative production in the underlying corpus. A sharp future jump in this rate would more likely indicate a change in the cataloguing project's own recording practice than a shift in historical production patterns -- flagged by the claim itself as the confound to watch for.

**Scope:** This conjecture concerns the manuscript-catalogue source(s) named below only -- it does not involve NAMAMI or India data at all, and is not decided by NAMAMI's India-state holdout in any way (no India state's landing can confirm or refute it). It is decided only by future growth of, or new landings to, the specific source(s) named below; no such test has run yet. Specifically: one source with a dedicated scribe-attestation layer (5,912 manuscript records, 6,375 scribe-attestation event rows; attestations count events per record, not deduplicated scribe identities across the corpus).

**Training-side evidence:** Attestation-count distribution: ordinal 1 (every attested record) 5,912; ordinal 2, 318 records (5.38% of attested records have a second scribe); ordinal 3, 71; decaying to a single record at ordinal 11.

**Holdout test and outcome:** No holdout test has been run for this conjecture. Evaluate the rival mechanisms against the training evidence alone.

**Status:** Not yet tested; decided only by this one source's own future growth.
