Claim

The study measured a mean positive µ142Nd value of +3.2 ± 0.9 (2 s.e., n = 13) in Fani Maoré basanites.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21348

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

Topics

Earth science · 1efd24fe Chemistry · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

1 of 4 review checks done · 1 counted

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

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:945ab542-a8db-8fb5-8b9b-3945b7f72e57

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 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.

Hide calculation

0.9781 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:63f00e64fbd9fd489c3b90a07e2a1f20e7170032ff952865b3da24e94cd9d787

Last changed at entry seq 24851; 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
ffa3ada0 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × 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	2.000000	2.000000
94240e20 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
ec105c36 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 ffa3ada0)

prior 0.50 → log-odds 0.000000 + 3.800000 (the counted weights) = 3.800000 → probability 0.9781

Under neighbouring settings of the same model: 0.9346 to 0.9929, a spread of 0.0583.

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 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

Supported. The main support is: The primary study reports the positive mean isotope anomaly and sample size. 4c8b6934

1 further item repeats the same origin and is not independent evidence. 584f3e7f

Review checks: 1 of 4. coverage:945ab542-a8db-8fb5-8b9b-3945b7f72e57

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

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)

Score trace

{
  "claim": "945ab542-a8db-8fb5-8b9b-3945b7f72e57",
  "links": [
    {
      "link": "3b6ba098-0173-8cae-8956-dbabffa3ada0",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "822b923f-004d-8cdc-8416-ff534c8b6934",
      "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
    },
    {
      "link": "ef6b0f56-5b1e-81e7-965c-969394240e20",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "8aafafc0-e242-8dfc-87ba-cb0eaeb38133",
      "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": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "3b6ba098-0173-8cae-8956-dbabffa3ada0",
      "link": "f90e6a97-1b00-84b2-b71d-648eec105c36",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "0030324f-ed41-82c4-b01c-6432584f3e7f",
      "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": "0.0583",
    "permissive": "0.9929",
    "conservative": "0.9346"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9781",
  "provisional": true,
  "evidence_sum": "3.800000",
  "snapshot_seq": 24851,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "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": [
        "3b6ba098-0173-8cae-8956-dbabffa3ada0",
        "ef6b0f56-5b1e-81e7-965c-969394240e20",
        "f90e6a97-1b00-84b2-b71d-648eec105c36"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}