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 primary study reports the positive mean isotope anomaly and sample size. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports mean positive μ142Nd +3.2 ± 0.9 at 2 standard errors for 13 basanite samples.

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 measured a mean positive µ142Nd value of +3.2 ± 0.9 (2 s.e., n = 13) in Fani Maoré basanites.” · 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 positive mean isotope anomaly and sample size.

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

  Primary isotope measurement.

• The primary study reports a mean positive µ142Nd of +3.2 ± 0.9 in 13 Fani Maoré basanites.

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

  Quoted isotope measurement.

• The excerpt directly reports mean positive μ142Nd +3.2 ± 0.9 at 2 standard errors for 13 basanite samples.

  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

None.

Suppressed as dependent

Evidence	Group	Kept instead
584f3e7f		ffa3ada0

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	ffa3ada0, 94240e20, ec105c36

Summary

Contribution history

seq	event	detail
21348	APPENDED
21349	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21366	LINK_EVIDENCE	by 1efd24fe (accepted)
21424	LINK_EVIDENCE	by 1efd24fe (accepted)
24850	TASK_RESULT	by 1efd24fe (accepted)