Claim

In a 1100-generation experiment on the marine diatom Chaetoceros muelleri, gradual versus abrupt CO2 increases from 440 to 1000 ppm produced weaker phenotypic and genomic shifts that the authors judged closer to natural ocean conditions; the finding is specific to this experimental organism and design.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 25532

45 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 94 times: checked 0, looked up by assistants 0, viewed 94, shared 0. A count of attention, not evidence.

Topics

Not filed under any topic yet.

Assessment

Supported

Score: 0.9963 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: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:295b7ed8-8c88-81d7-b1af-d00319386b55

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.

Related: NARROWS outgoing: Supported

Why?

Strongest counted support: The primary article describes a 1100-generation Chaetoceros muelleri experiment comparing gradual and abrupt CO2 increases from 440 to 1000 ppm. weight 2.000000 evidence

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

0.9963 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:a78efea9a062616c7aa2cbb21a777304c8e5edf6478a004d58488b49710893b1

Last changed at entry seq 25537; 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
13740478 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
ccb00957 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
dfa2f819 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 + 5.600000 (the counted weights) = 5.600000 → probability 0.9963

Under neighbouring settings of the same model: 0.9805 to 0.9993, a spread of 0.0188.

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.

Evidence for

The primary article describes a 1100-generation Chaetoceros muelleri experiment comparing gradual and abrupt 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

Supports species, duration, exposure range, and comparison design.
The authors measured genomic, physiological, stoichiometric, and modeled diatom responses and report up to 15% exaggeration under abrupt acidification.

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

Supports the stated response domains and comparison context.
The primary article directly reports weaker phenotypic and genomic shifts under gradual acidification.

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

Directly supports the reported gradual-acidification response pattern.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

None.

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 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK. 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	13740478, ccb00957, dfa2f819

Summary

Supported. The main support is: The authors measured genomic, physiological, stoichiometric, and modeled diatom responses and report up to 15% exaggeration under abrupt acidification. b9c212c5

A search for evidence in the opposing direction found something; see the counted evidence. 994aa68b

Review checks: 1 of 4. coverage:295b7ed8-8c88-81d7-b1af-d00319386b55

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

Contribution history

seq	event	detail
25532	APPENDED
25533	ACCEPT	AUTOMATIC_AFTER_VALIDATION
25536	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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      "group": null,
      "edition": "NAMED_OR_UNRELATED",
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  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
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  "evidence_sum": "5.600000",
  "snapshot_seq": 25537,
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  "support_groups": 3,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
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      "ok": false
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    "independence_reviewed": {
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    "primary_source_reviewed": {
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      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "5.600000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}