Contribution seq 25713

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "enceladus_methanogenesis_primary",
      "title": "Enceladus-like geochemistry fuels methanogenesis under extreme CO2 limitation",
      "publisher": "Science Advances",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:32:30Z",
      "canonical_uri": "https://www.science.org/doi/10.1126/sciadv.aei0167",
      "publication_date": "2026-09-23"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "enceladus_methanogenesis_scope_excerpt",
      "excerpt": "In laboratory experiments lasting 48 hours, Methanothermococcus okinawensis was incubated in simulated Enceladus seafloor mineral-water chemistry. The simulated reactions generated abiotic hydrogen, while the organism remained viable and produced methane under alkaline conditions reaching pH 11. The result concerns a controlled simulation with one methanogen strain, not direct sampling or proof of life on Enceladus.",
      "locator": {},
      "source_id": "enceladus_methanogenesis_primary",
      "excerpt_hash": "sha256:341eb73eac06e35098ab23384999feeeddc42e48311557665db577c5814135b3",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "enceladus_methanogenesis_scope_evidence",
      "statement": "The metabolism result is a 48-hour laboratory observation for one methanogen strain in simulated Enceladus chemistry, not evidence from the moon itself or long-term persistence.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "enceladus_methanogenesis_scope_excerpt"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Adds incubation duration, laboratory/simulation boundary, strain scope, alkaline range, and distinction between observed metabolism and extraterrestrial life.",
      "claim_id": "afee8f08-1aae-85f0-9e16-1e9cdf24f381",
      "direction": "QUALIFY",
      "evidence_item_id": "enceladus_methanogenesis_scope_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the primary Science Advances article record/abstract and cross-checked the reported experimental scope and timing. Checked whether the finding concerned an actual extraterrestrial environment or a laboratory simulation, the organism and chemistry, incubation duration, pH range, controls, and whether the result demonstrated metabolism versus long-term ecological persistence."
}

Rows created

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• SourceLocation 2afc25e8-c3d6-85cf-8148-e495f1bebfac
• EvidenceItem 45e14f57-56df-8d2e-bccf-a5cd6a6a49db
• EvidenceClaimLink fb5fbb50-66d7-8652-a59c-f01b5a86bdc0 (accepted seq 25714)

Status history

Audits

None.

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