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 its experimental organism, CO2 range and duration. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly reports Chaetoceros muelleri, abrupt and gradual CO2 increases from 440 to 1000 ppm, and 1100 generations.

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

Your view

Registered views

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 its experimental organism, CO2 range and duration.

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

  Primary experiment description.

• The quoted passage directly reports Chaetoceros muelleri, abrupt and gradual CO2 increases from 440 to 1000 ppm, and 1100 generations.

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

  The excerpt states every experimental detail in the claim.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
c6f8b006		1e14b1bb

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	1e14b1bb, 9a67ac35

Summary

Contribution history

seq	event	detail
19917	APPENDED
19918	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19935	LINK_EVIDENCE	by 1efd24fe (accepted)
24505	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "8ff06347-fece-84f8-a545-f426be210422",
  "links": [
    {
      "link": "52ebf3ef-6125-8b7d-86d0-6ea41e14b1bb",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "2a2ea5d5-afe7-86cc-9916-c1a69bebd8f6",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DATASET_RESULT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "52ebf3ef-6125-8b7d-86d0-6ea41e14b1bb",
      "link": "e1f1f22b-9632-8d54-9e53-173d9a67ac35",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "7810c340-18d3-8279-89f4-0d47c6f8b006",
      "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": "0.1331",
    "permissive": "0.9121",
    "conservative": "0.7790"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8581",
  "provisional": true,
  "evidence_sum": "1.800000",
  "snapshot_seq": 25530,
  "prior_log_odds": "0.000000",
  "support_groups": 1,
  "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": [
        "52ebf3ef-6125-8b7d-86d0-6ea41e14b1bb",
        "e1f1f22b-9632-8d54-9e53-173d9a67ac35"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}