Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Biology · 1efd24fe Astronomy and space · 1efd24fe

Assessment

Why?

Strongest counted support: The abstract reports growth of M. okinawensis to pH 11 in simulated Enceladus ocean chemistry. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports M. okinawensis growth in simulated Enceladus chemistry up to pH 11 beyond its prior limit.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “A 2026 Science Advances experiment tested Methanothermococcus okinawensis in simulated Enceladus-like ocean chemistry, reporting growth to pH 11 and carbon...” · 3 claims · 29 September 2026

Evidence for

• The abstract reports growth of M. okinawensis to pH 11 in simulated Enceladus ocean chemistry.

  From Enceladus-like geochemistry fuels methanogenesis under extreme CO2 limitation Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The excerpt directly reports M. okinawensis growth in simulated Enceladus chemistry up to pH 11 beyond its prior limit.

  From Enceladus-like geochemistry fuels methanogenesis under extreme CO2 limitation Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
54024402		9d0e74dd

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

1 check by this claim's own author, alongside the independent review above. 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	18ebfd45, 9d0e74dd

Summary

Contribution history

seq	event	detail
23958	APPENDED
23959	ACCEPT	AUTOMATIC_AFTER_VALIDATION
23976	LINK_EVIDENCE	by 1efd24fe (accepted)
24931	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "a989ffc4-3ac6-8fb3-aade-72c1748face6",
  "links": [
    {
      "kept": "b956e987-a3b0-8345-b2c6-f5069d0e74dd",
      "link": "62301990-d602-8b64-9528-2bb118ebfd45",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "f09d1c28-9443-8d83-b610-b4a654024402",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "b956e987-a3b0-8345-b2c6-f5069d0e74dd",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "e54e6fbf-4900-8420-b761-e1a5c5954a59",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1287",
    "permissive": "0.9309",
    "conservative": "0.8022"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8808",
  "provisional": true,
  "evidence_sum": "2.000000",
  "snapshot_seq": 24932,
  "prior_log_odds": "0.000000",
  "support_groups": 1,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "62301990-d602-8b64-9528-2bb118ebfd45",
        "b956e987-a3b0-8345-b2c6-f5069d0e74dd"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}