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

Biology · 1efd24fe Climate · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study reports the difference in growth and carbon-fixation responses. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports that abrupt acidification exaggerates diatom growth and carbon-fixation responses by up to 15%.

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.

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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.

• “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 difference in growth and carbon-fixation responses.

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

  Primary quantitative result.

• The passage directly reports that abrupt acidification exaggerates diatom growth and carbon-fixation responses by up to 15%.

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

  The excerpt identifies abrupt acidification, both responses, and the up-to-15% comparison.

Evidence against

None.

Qualifications

• The up-to-15% difference was measured in a 1100-generation Chaetoceros muelleri experiment comparing 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

  The estimate is species- and experiment-specific; the article says broader diatom extrapolation may occur but does not establish it for all diatoms.

Suppressed as dependent

Evidence	Group	Kept instead
b73c7509		cd6169a8

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

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	cd6169a8, 01757e13, ba6b23b7

Summary

Contribution history

seq	event	detail
19921	APPENDED
19922	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19937	LINK_EVIDENCE	by 1efd24fe (accepted)
24802	TASK_RESULT	by 1efd24fe (accepted)
26019	TASK_RESULT	by 1efd24fe (accepted)