Claim

The study’s mixing model estimated that 8–10% Hadean bridgmanite in the source could reproduce the mean µ142Nd value of Fani Maoré lavas.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21356

Referenced 99 times: checked 2, looked up by assistants 0, viewed 62, shared 35. A count of attention, not evidence.

Topics

Earth science · 1efd24fe Astronomy and space · 1efd24fe

Assessment

Supported

Score: 0.9734 under ledger-default@0.3.0 at snapshot 27745

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

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:fb18d356-66ad-852e-ba7d-f73dd274dc48

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

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.

Hide calculation

0.9734 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 5 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:613566dae89e39cd2f4dc54e16db2e2126d05afae07b79e910ba9b602cd801ca

Last changed at entry seq 24350; 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
a8d510ee 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
41c9d13f support	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × 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	0.000000	0.000000 (dependent strongest only, kept a8d510ee)
d656e117 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 a8d510ee)
778dc0cf 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
cde720a6 qualify	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × 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	0.000000	0.000000 (non directional)

prior 0.50 → log-odds 0.000000 + 3.600000 (the counted weights) = 3.600000 → probability 0.9734

Under neighbouring settings of the same model: 0.9255 to 0.9908, a spread of 0.0653.

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’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

Supported. The main support is: The study’s model estimates 8–10% Hadean bridgmanite could reproduce the observed mean anomaly. 8619d649

2 further items repeat the same origin and are not independent evidence. d05ea1d891e93d77

Qualifier: The model result is reported as 8–10% with an additional ±3% uncertainty, which the target claim omits. d498acdc

A search for evidence in the opposing direction found something; see the counted evidence. afd232e1

Review checks: 1 of 4. coverage:fb18d356-66ad-852e-ba7d-f73dd274dc48

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

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)

Score trace

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