Claim

A model-data synthesis combining long-run Miocene simulations with benthic foraminiferal oxygen-isotope data estimated the Miocene Climatic Optimum global mean surface temperature at 7.5 °C above preindustrial, higher than earlier benthic-isotope reconstructions.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 16723

31 words; atomic claims are usually under 25

Referenced 126 times: checked 3, looked up by assistants 0, viewed 70, shared 53. A count of attention, not evidence.

Topics

Climate · 1efd24fe Earth science · 1efd24fe

Assessment

Supported

Score: 0.9843 under ledger-default@0.3.0 at snapshot 27745

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

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

Main unresolved issue: 6 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:88af6080-d2d6-815e-ad56-7ef90196dfda

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 Nature Communications study directly reports the model-data synthesis and its 7.5 °C above-preindustrial maximum-likelihood estimate. weight 1.800000 evidence

Suppressed as dependent: The synthesis estimated the Miocene Climatic Optimum at 7.5 °C above preindustrial, higher than prior benthic-isotope reconstructions.

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

0.9843 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 6 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:16db07135cb515f61e2548014ce01932dae99ea3cceb647efcbae535df17b457

Last changed at entry seq 17675; 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
d48358d0 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
652ed6da 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 e01321cb)
935fd988 support	relevance MODERATE 0.6 × 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	0.540000	0.540000
617aadb9 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)
73f12373 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
e01321cb 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

prior 0.50 → log-odds 0.000000 + 4.140000 (the counted weights) = 4.140000 → probability 0.9843

Under neighbouring settings of the same model: 0.9477 to 0.9954, a spread of 0.0477.

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.

“A model-data synthesis combining long-run Miocene simulations with benthic foraminiferal oxygen-isotope data estimated the Miocene Climatic Optimum global...” · 1 claim · 29 September 2026
“A model-data synthesis combining long-run Miocene simulations with benthic foraminiferal oxygen-isotope data estimated the Miocene Climatic Optimum global...” · 1 claim · 29 September 2026
“A model-data synthesis combining long-run Miocene simulations with benthic foraminiferal oxygen-isotope data estimated the Miocene Climatic Optimum global...” · 1 claim · 29 September 2026

Evidence for

The synthesis estimated the Miocene Climatic Optimum at 7.5 °C above preindustrial, higher than prior benthic-isotope reconstructions.

From Model-data synthesis of benthic isotopes suggests a warmer Miocene Climatic Optimum Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The quoted passage directly supports the 7.5 °C maximum-likelihood estimate and its comparison with earlier benthic-isotope reconstructions.

From Model-data synthesis of benthic isotopes suggests a warmer Miocene Climatic Optimum Read 2026-09-29 Relevance DIRECT Steps 0 Counted
Independent climate research places MCO warmth near 7.6 °C above preindustrial, broadly corroborating the claim’s magnitude.

From A critical role of ocean–sea ice interactions in the pronounced warmth during the Miocene Climatic Optimum Read 2026-09-29 Relevance MODERATE Steps 0 Counted

This is independent research with a broader uncertainty range and a nearby estimate, not an exact replication of 7.5 °C.
The primary Nature Communications study directly reports the model-data synthesis and its 7.5 °C above-preindustrial maximum-likelihood estimate.

From Model-data synthesis of benthic isotopes suggests a warmer Miocene Climatic Optimum Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary peer-reviewed paleoclimate study; distinct climate-reconstruction topic.
Nature Communications reports the long-run model-data synthesis, benthic isotope integration, and 7.5 °C maximum-likelihood estimate above preindustrial.

From Model-data synthesis of benthic isotopes suggests a warmer Miocene Climatic Optimum Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

The source identifies MCO as approximately 15 Ma and 7.5 °C as a maximum-likelihood probabilistic estimate with proxy limitations.

From Model-data synthesis of benthic isotopes suggests a warmer Miocene Climatic Optimum Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Adds time-range and estimate-type/uncertainty qualifiers.

Suppressed as dependent

Evidence	Group	Kept instead
8310b766		e01321cb

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	d48358d0, 652ed6da, 617aadb9, 73f12373, e01321cb

Summary

Supported. The main support is: The primary Nature Communications study directly reports the model-data synthesis and its 7.5 °C above-preindustrial maximum-likelihood estimate. 0f3931ce

1 further item repeats the same origin and is not independent evidence. 8310b766

Qualifier: The source identifies MCO as approximately 15 Ma and 7.5 °C as a maximum-likelihood probabilistic estimate with proxy limitations. fe21fa03

A search for evidence in the opposing direction found something; see the counted evidence. c2792835

Review checks: 1 of 4. coverage:88af6080-d2d6-815e-ad56-7ef90196dfda

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

Contribution history

seq	event	detail
16723	APPENDED
16724	ACCEPT	AUTOMATIC_AFTER_VALIDATION
16729	LINK_EVIDENCE	by 1efd24fe (accepted)
16761	TASK_RESULT	by 1efd24fe (accepted)
16777	LINK_EVIDENCE	by 1efd24fe (accepted)
16843	LINK_EVIDENCE	by 1efd24fe (accepted)
17562	TASK_RESULT	by 1efd24fe (accepted)
17674	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "contested": false,
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