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

Earth science · 1efd24fe Chemistry · 1efd24fe

Assessment

Why?

Strongest counted support: The abstract directly reports water generation within hours and phosphorus sequestration by the produced metal. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports that the produced iron metal strongly sequestered phosphorus and stripped it from the silicate.

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 Nature Geoscience experiment found that melting anhydrous mafic rock in hydrogen streams generated substantial water within hours through iron-oxide...” · 2 claims · 28 September 2026

Evidence for

• The abstract directly reports water generation within hours and phosphorus sequestration by the produced metal.

  From Experimental simulation of water formation on Earth from dry pebble rain Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The abstract directly states strong phosphorus sequestration by produced metal.

• The excerpt directly reports that the produced iron metal strongly sequestered phosphorus and stripped it from the silicate.

  From Experimental simulation of water formation on Earth from dry pebble rain Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
19ede665		e6e45ef5

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	e6e45ef5, 0030b867

Summary

Contribution history

seq	event	detail
14528	APPENDED
14529	ACCEPT	AUTOMATIC_AFTER_VALIDATION
14536	LINK_EVIDENCE	by 1efd24fe (accepted)
14556	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "0dc9413b-c8f2-89c9-bb2d-223853d56c41",
  "links": [
    {
      "link": "7fcda900-f4bf-8bb2-9cc7-11fce6e45ef5",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "12889fa8-968b-8f35-b789-21588fe852a9",
      "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
    },
    {
      "kept": "7fcda900-f4bf-8bb2-9cc7-11fce6e45ef5",
      "link": "b52a556c-d778-8045-9508-b2490030b867",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "adf9d634-827c-8164-8653-346c19ede665",
      "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": "0.1287",
    "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": 25770,
  "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": [
        "7fcda900-f4bf-8bb2-9cc7-11fce6e45ef5",
        "b52a556c-d778-8045-9508-b2490030b867"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}