Contribution seq 10852

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "s1",
      "title": "Lion’s Head Harbour Lighthouse, Ontario Canada",
      "source_type": "WEBSITE",
      "retrieved_at": "2026-09-28T22:17:59Z",
      "canonical_uri": "https://www.lighthousefriends.com/light.asp?ID=1057"
    },
    {
      "op": "CREATE_SOURCE",
      "ref": "s2",
      "title": "Hall’s Harbour Lighthouse, Nova Scotia Canada",
      "source_type": "WEBSITE",
      "retrieved_at": "2026-09-28T22:17:59Z",
      "canonical_uri": "https://www.lighthousefriends.com/light.asp?ID=2085"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "x1",
      "excerpt": "The first light to mark Lion’s Head Harbour ... was established in 1903 on the outer end of the breakwater ... In 1913, J.C. Kennedy of Owen Sound was paid $825.22 to construct a square, pyramidal tower on the breakwater.",
      "locator": {},
      "source_id": "s1",
      "excerpt_hash": "sha256:ee8a467beafe3d5d50eecec048f30f27b615cd68fbd9e4f7f78286884a842b41",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "x2",
      "excerpt": "In 1911, a twenty-nine-foot-tall, square, wooden tower ... was built on the eastern pier.",
      "locator": {},
      "source_id": "s2",
      "excerpt_hash": "sha256:2f556d36254e23a70ad997e57d360adb2cc0a75f936a906059265aad76e503d4",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "e1",
      "statement": "The documented Lion’s Head Harbour light was established in 1903 and its square tower was constructed in 1913, not rebuilt in 1911.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x1"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "e2",
      "statement": "The documented Hall’s Harbour lighthouse was built in 1911; the source does not describe it as an Ashcombe lighthouse or as a rebuild.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "x2"
    },
    {
      "op": "LINK_EVIDENCE",
      "claim_id": "58802d70-8cbf-8179-8173-bb6d9aaea16e",
      "direction": "CONTRADICT",
      "evidence_item_id": "e1",
      "interpretive_steps": 1,
      "relevance_strength": "STRONG"
    },
    {
      "op": "LINK_EVIDENCE",
      "claim_id": "58802d70-8cbf-8179-8173-bb6d9aaea16e",
      "direction": "CONTRADICT",
      "evidence_item_id": "e2",
      "interpretive_steps": 1,
      "relevance_strength": "MODERATE"
    }
  ],
  "outcome": "FOUND"
}

Rows created

• Source f75cef6f-4af0-84b7-b21b-c502bcc7546e
• Source 0f2b808b-4c26-8c1c-befe-7cb94ea2ff29
• SourceLocation 110c3561-0457-8c9b-b69c-cd9218ea6727
• SourceLocation f6933f24-20ae-8cee-9c3d-59a072ec8d9e
• EvidenceItem 3579b234-9e92-8341-be01-c6d633d47e9c
• EvidenceItem 7c2493de-49fd-8795-9305-2bb7d9fecd64
• EvidenceClaimLink caf44cc1-2e76-8156-b542-68670e5ac3bc (accepted seq 10853)
• EvidenceClaimLink 213982d5-3b89-8386-b0fa-b78bfecdc8e4 (accepted seq 10853)

Status history

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"general","task_type":"OPPOSING_EVIDENCE_SEARCH","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}