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 Astronomy and space · 1efd24fe

Assessment

Why?

Strongest counted support: The study’s model estimates 8–10% Hadean bridgmanite could reproduce the observed mean anomaly. weight 1.800000 evidence

Suppressed as dependent: The primary study reports the modelled Hadean-bridgmanite fraction needed to reproduce the observed anomaly.; The supplied passage directly reports that 8–10% Hadean bridgmanite reproduces the mean µ142Nd value of Fani Maoré lavas.

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 Supported.

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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.

• “The study’s mixing model estimated that 8–10% Hadean bridgmanite in the source could reproduce the mean µ142Nd value of Fani Maoré lavas.” · 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 reports the modelled Hadean-bridgmanite fraction needed to reproduce the observed anomaly.

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

  Primary mixing-model result.

• The study’s model estimates 8–10% Hadean bridgmanite could reproduce the observed mean anomaly.

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

  Quoted mixing-model result.

• The supplied passage directly reports that 8–10% Hadean bridgmanite reproduces the mean µ142Nd value of Fani Maoré lavas.

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

  The quoted passage directly gives the percentage range and modeled outcome.

• Nature reports that 8–10% Hadean bridgmanite reproduces Fani Maoré’s mean µ142Nd value, while ε143Nd requires additional source components.

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

Evidence against

None.

Qualifications

• The model result is reported as 8–10% with an additional ±3% uncertainty, which the target claim omits.

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

  The omitted uncertainty is material for a quantitative modeled estimate.

Suppressed as dependent

Evidence	Group	Kept instead
d05ea1d8		a8d510ee
91e93d77		a8d510ee

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	a8d510ee, 41c9d13f, d656e117, 778dc0cf, cde720a6

Summary

Contribution history

seq	event	detail
21356	APPENDED
21357	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21370	LINK_EVIDENCE	by 1efd24fe (accepted)
21489	LINK_EVIDENCE	by 1efd24fe (accepted)
22066	TASK_RESULT	by 1efd24fe (accepted)
23002	TASK_RESULT	by 1efd24fe (accepted)
24349	TASK_RESULT	by 1efd24fe (accepted)