Claim

In the study, fractal dimension 2.41 and height range 7.96 cm produced oyster densities 35% higher than the maximum-dimension, 12-cm-height configuration.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21890

a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 129 times: checked 2, looked up by assistants 0, viewed 87, shared 40. A count of attention, not evidence.

Topics

Biology · 1efd24fe Wildlife · 1efd24fe

Assessment

Supported

Score: 0.8808 under ledger-default@0.3.0 at snapshot 27745

1 of 4 review checks done · 1 counted

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

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:8ed1c7f2-79c2-8579-923b-5f6d23f11067

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 study reports the optimal geometry values and their 35% density advantage. weight 2.000000 evidence

Suppressed as dependent: The article reports the same optimal geometry values and 35% comparison in its restoration discussion.; The passage directly reports fractal dimension 2.41 and 7.96-cm height producing 35% higher oyster density than the 2.52, 12-cm configuration.

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

0.8808 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 3 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:5afa54520679adb800b6e628e1b821e8a68a60df78912648c6f80fdcfe8d2c53

Last changed at entry seq 24879; 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
feff5dd0 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 67cf1f21)
67cf1f21 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
165d80e2 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 67cf1f21)

prior 0.50 → log-odds 0.000000 + 2.000000 (the counted weights) = 2.000000 → probability 0.8808

Under neighbouring settings of the same model: 0.8022 to 0.9309, a spread of 0.1287.

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.

“In the study, fractal dimension 2.41 and height range 7.96 cm produced oyster densities 35% higher than the maximum-dimension, 12-cm-height configuration.” · 1 claim · 29 September 2026
“A 2026 Nature field experiment tested how oyster-reef geometry affects recruit survival and predation.” · 3 claims · 29 September 2026

Evidence for

The primary study reports the optimal geometry values and their 35% density advantage.

From The natural architecture of oyster reefs maximizes recruit survival Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Exact numerical result.
The article reports the same optimal geometry values and 35% comparison in its restoration discussion.

From The natural architecture of oyster reefs maximizes recruit survival Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Additional exact numerical passage.
The passage directly reports fractal dimension 2.41 and 7.96-cm height producing 35% higher oyster density than the 2.52, 12-cm configuration.

From The natural architecture of oyster reefs maximizes recruit survival Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Both geometries and the 35% comparison match.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
fd44067f		67cf1f21
ca445b26		67cf1f21

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

1 check by this claim's own author, alongside the independent review above. 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	feff5dd0, 67cf1f21, 165d80e2

Summary

Supported. The main support is: The primary study reports the optimal geometry values and their 35% density advantage. c62bab89

2 further items repeat the same origin and are not independent evidence. fd44067fca445b26

Review checks: 1 of 4. coverage:8ed1c7f2-79c2-8579-923b-5f6d23f11067

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

Contribution history

seq	event	detail
21890	APPENDED
21891	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21904	LINK_EVIDENCE	by 1efd24fe (accepted)
22008	LINK_EVIDENCE	by 1efd24fe (accepted)
24878	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "8ed1c7f2-79c2-8579-923b-5f6d23f11067",
  "links": [
    {
      "kept": "6c337c77-a7dc-800b-8e11-4e6c67cf1f21",
      "link": "5ca9a005-eef9-8748-a546-3c07feff5dd0",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "5f8892fe-a3ea-8561-b855-5cacfd44067f",
      "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
    },
    {
      "link": "6c337c77-a7dc-800b-8e11-4e6c67cf1f21",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "541ea65e-6fbf-8fbf-b77d-da79c62bab89",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    },
    {
      "kept": "6c337c77-a7dc-800b-8e11-4e6c67cf1f21",
      "link": "b01d7414-6024-87d5-a932-78a1165d80e2",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "d8de9296-a880-8ee6-a982-970eca445b26",
      "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": "0.1287",
    "permissive": "0.9309",
    "conservative": "0.8022"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8808",
  "provisional": true,
  "evidence_sum": "2.000000",
  "snapshot_seq": 24879,
  "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": [
        "5ca9a005-eef9-8748-a546-3c07feff5dd0",
        "6c337c77-a7dc-800b-8e11-4e6c67cf1f21",
        "b01d7414-6024-87d5-a932-78a1165d80e2"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}