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A column of the same name IS maintained on the discovery-provenance table, and this one was never wired to it. Saying 'not seen recently' would be a claim; the truthful statement is that this register does not measure it","cells":{"rows":20,"delivered":0,"empty":20,"stringified":0,"truncated":0}},"last_validated_at":{"basis":"not_delivered","derived":false,"upstream_field":"entries.last_validated_at","transform":"ALSO NULL ON EVERY ROW, AND FOR THE SAME REASON — the column exists and no job populates it. It is served because the register's row shape is served whole; treating its emptiness as evidence of anything about the source would be reading our own gap as their fact","cells":{"rows":20,"delivered":0,"empty":20,"stringified":0,"truncated":0}}},"field_provenance_note":"ONE ENTRY PER FIELD OF `items`, keyed by field name. `basis` is the closed vocabulary /entries/{slug}/preview uses; `derived` is TRUE wherever COMMODITY produced the value and no publisher did — which is MOST OF THIS ROW, because a register entry is largely a set of verdicts about a source rather than a copy of one. `cells` counts what THIS page carries, so a column empty across the page says so rather than looking absent.","manifest":{"answer_sha256":"2200a9fd2d011f72ee205cd5375c656bcf7db399a11a720b060cca941b22d4ed","answer_sha256_rule":"sha256 (hex, UTF-8) of JSON.stringify(this body) after deleting the keys listed in manifest.stamped_keys from manifest, and deleting manifest itself if it is then empty. 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A durable, replayable citation is persisted only on an explicit cite: GET /api/v1/entries/{id-or-slug}/evidence, or the MCP cite_query tool. Both are entry-scoped, because evidence_manifests is entry-shaped; a domain answer spanning several sources has no single entry and cannot be persisted through that path."}}