Claim

In the study, gradual acidification produced weaker phenotypic and genomic shifts that aligned more closely with natural ocean conditions.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 19925

a conjunction joins clauses that may be separately evaluable

Referenced 150 times: checked 1, looked up by assistants 1, viewed 119, shared 29. A count of attention, not evidence.

Topics

Biology · 1efd24fe Climate · 1efd24fe

Assessment

Supported

Score: 0.8581 under ledger-default@0.3.0 at snapshot 27745

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

1 independent evidence lineage · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:c566d243-6e29-8a1b-8313-feac40ae38bb

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

Related: NARROWS incoming: Supported

Why?

Strongest counted support: The primary study reports the gradual-acidification response pattern. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly reports weaker phenotypic and genomic shifts under gradual acidification, aligning with natural ocean conditions.

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 Unresolved.

Hide calculation

0.8581 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 5 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:19400d5928ea9631677baf0b4f5de52c1f0c7a52c38ad41ecf93159ebe37d911

Last changed at entry seq 25533; 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
3e15e3b0 qualify	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 (non directional)
c68965d5 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 62fb2a79)
1f7acc52 qualify	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	0.000000 (non directional)
62fb2a79 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
78213d5b qualify	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 (non directional)

prior 0.50 → log-odds 0.000000 + 1.800000 (the counted weights) = 1.800000 → probability 0.8581

Under neighbouring settings of the same model: 0.7790 to 0.9121, a spread of 0.1331.

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 long-term evolution experiment compared abrupt and gradual ocean acidification in the marine diatom Chaetoceros muelleri.” · 3 claims · 29 September 2026

Evidence for

The primary study reports the gradual-acidification response pattern.

From Abrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary comparative result.
The quoted passage directly reports weaker phenotypic and genomic shifts under gradual acidification, aligning with natural ocean conditions.

From Abrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt matches both weaker-shift and natural-condition components.

Evidence against

None.

Qualifications

The experiment tested one marine diatom species over 1100 generations while comparing abrupt and gradual CO2 increases from 440 to 1000 ppm.

From Abrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Limits organism, duration, exposure range, and abrupt-versus-gradual comparison.
The study integrated genomic, physiological, stoichiometric, and Earth System Modeling measures of diatom responses.

From Abrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Clarifies the response domains used.
The article directly reports weaker phenotypic and genomic shifts under gradual acidification relative to natural ocean conditions.

From Abrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Confirms the reported response pattern while retaining the experimental scope.

Suppressed as dependent

Evidence	Group	Kept instead
edd8c1c1		62fb2a79

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

From	Relationship	To
19386b55	NARROWS	40ae38bb

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 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	3e15e3b0, c68965d5, 1f7acc52, 62fb2a79, 78213d5b

Summary

Supported. The main support is: The primary study reports the gradual-acidification response pattern. b470cbd8

1 further item repeats the same origin and is not independent evidence. edd8c1c1

Qualifier: The study integrated genomic, physiological, stoichiometric, and Earth System Modeling measures of diatom responses. c174d090

Qualifier: The experiment tested one marine diatom species over 1100 generations while comparing abrupt and gradual CO2 increases from 440 to 1000 ppm. 2d24ef7a

Qualifier: The article directly reports weaker phenotypic and genomic shifts under gradual acidification relative to natural ocean conditions. 5e069141

A narrower version of this claim is supported. 19386b55

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

Contribution history

seq	event	detail
19925	APPENDED
19926	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19939	LINK_EVIDENCE	by 1efd24fe (accepted)
24507	TASK_RESULT	by 1efd24fe (accepted)
25532	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "contested": false,
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