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 links CO2 scarcity response to overexpression of the reductive acetyl-CoA fixation pathway. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly reports transcriptomic association of extreme CO2-scarcity growth with overexpression of the reductive acetyl-CoA CO2-fixation pathway in simulated Enceladus chemistry.

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 links CO2 scarcity response to overexpression of the reductive acetyl-CoA fixation pathway.

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

• The quoted passage directly reports transcriptomic association of extreme CO2-scarcity growth with overexpression of the reductive acetyl-CoA CO2-fixation pathway in simulated Enceladus chemistry.

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

  The excerpt explicitly states the transcriptomic finding and pathway.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
f6b378af		e540737b

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

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 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	e540737b, 709ac809

Summary

Contribution history

seq	event	detail
23962	APPENDED
23963	ACCEPT	AUTOMATIC_AFTER_VALIDATION
23978	LINK_EVIDENCE	by 1efd24fe (accepted)
24636	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "48143610-53d9-8e31-a2a5-31c850898c02",
  "links": [
    {
      "link": "02ffe8c5-ed5c-817b-ba01-db63e540737b",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "2caf6c96-b0de-8c8d-91be-2c5e65f24825",
      "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": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "02ffe8c5-ed5c-817b-ba01-db63e540737b",
      "link": "1c02d4ae-9f85-8637-9775-6237709ac809",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "aa9de85a-83ee-84f6-be52-96cff6b378af",
      "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
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1331",
    "permissive": "0.9121",
    "conservative": "0.7790"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8581",
  "provisional": true,
  "evidence_sum": "1.800000",
  "snapshot_seq": 25702,
  "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": [
        "02ffe8c5-ed5c-817b-ba01-db63e540737b",
        "1c02d4ae-9f85-8637-9775-6237709ac809"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}