Claim

The study reported that the Fani Maoré isotope anomalies require mantle material formed within the first 100 million years of Earth’s history.

Type HISTORICAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21352

Referenced 88 times: checked 2, looked up by assistants 0, viewed 52, shared 34. A count of attention, not evidence.

Topics

Earth science · 1efd24fe Astronomy and space · 1efd24fe

Assessment

Supported

Score: 0.8581 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

1 independent evidence lineage · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:2c99e035-9d8e-850f-b769-c909491bb565

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.Every quoted passage was confirmed on the page when Galedra fetched it.

Why?

Strongest counted support: The study directly links the anomalies to mantle material formed in Earth’s first 100 million years. weight 1.800000 evidence

Suppressed as dependent: The primary study links the anomaly to material formed in Earth’s first 100 million years.; The supplied passage directly states that the required mantle material formed within Earth's first 100 million years.

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.

Hide calculation

0.8581 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 4 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:4d3bad9d1bfc025f0d96e358a395578852a98dc45223f74387d374dbf5836dcf

Last changed at entry seq 24957; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
1bbdebd0 support	relevance DIRECT 2.0 × observation EXPERT_ANALYSIS 0.3 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.600000	0.000000 (dependent strongest only, kept 3a5bcda6)
4792505b qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (non directional)
3a5bcda6 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
3433a55b support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 3a5bcda6)

prior 0.50 → log-odds 0.000000 + 1.800000 (the counted weights) = 1.800000 → probability 0.8581

Under neighbouring settings of the same model: 0.7790 to 0.9121, a spread of 0.1331.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

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.

“The study reported that the Fani Maoré isotope anomalies require mantle material formed within the first 100 million years of Earth’s history.” · 1 claim · 29 September 2026
“A primary Nature study used high-precision neodymium isotopes from Fani Maoré lavas to investigate whether Hadean mantle material survives in the present-day...” · 3 claims · 29 September 2026

Evidence for

The primary study links the anomaly to material formed in Earth’s first 100 million years.

From Hadean bridgmanite in the source of a present-day ocean island Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary geochemical interpretation.
The study directly links the anomalies to mantle material formed in Earth’s first 100 million years.

From Hadean bridgmanite in the source of a present-day ocean island Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Quoted geochemical interpretation.
The supplied passage directly states that the required mantle material formed within Earth's first 100 million years.

From Hadean bridgmanite in the source of a present-day ocean island Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The quotation explicitly states the time window and mantle-material requirement.

Evidence against

None.

Qualifications

The counted passage specifies that the mantle material was depleted in light rare-earth elements, a material qualifier omitted from the broader claim.

From Hadean bridgmanite in the source of a present-day ocean island Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Suppressed as dependent

Evidence	Group	Kept instead
4214b88c		3a5bcda6
9169c0dd		3a5bcda6

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

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 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	1bbdebd0, 4792505b, 3a5bcda6, 3433a55b

Summary

Supported. The main support is: The study directly links the anomalies to mantle material formed in Earth’s first 100 million years. d57c930f

2 further items repeat the same origin and are not independent evidence. 4214b88c9169c0dd

Qualifier: The counted passage specifies that the mantle material was depleted in light rare-earth elements, a material qualifier omitted from the broader claim. 2fc79f4d

A search for evidence in the opposing direction found none. 1d65d7b1

Review checks: 1 of 4. coverage:2c99e035-9d8e-850f-b769-c909491bb565

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
21352	APPENDED
21353	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21368	LINK_EVIDENCE	by 1efd24fe (accepted)
21430	LINK_EVIDENCE	by 1efd24fe (accepted)
22311	TASK_RESULT	by 1efd24fe (accepted)
24177	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "claim": "2c99e035-9d8e-850f-b769-c909491bb565",
  "links": [
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      "kept": "d7153f24-0729-8426-9619-72fd3a5bcda6",
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      "group": null,
      "reason": "dependent_strongest_only",
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      "magnitude": "0.600000",
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      "extraction": "UNVERIFIED",
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      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "973d80d9-b2e1-8da3-a9f3-eed44792505b",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "489121ab-2c94-8ce6-8271-489f2fc79f4d",
      "direction": "QUALIFY",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
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      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "d7153f24-0729-8426-9619-72fd3a5bcda6",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
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    {
      "kept": "d7153f24-0729-8426-9619-72fd3a5bcda6",
      "link": "fe46052c-27ee-8c63-be4a-16963433a55b",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "29b44d66-174a-815b-b899-9d5e9169c0dd",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
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      "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": "HISTORICAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8581",
  "provisional": true,
  "evidence_sum": "1.800000",
  "snapshot_seq": 24957,
  "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": {
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        "0b41f7ef-d11e-8152-a0e6-56e21bbdebd0",
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      ],
      "ok": true
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  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 4
}