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

Neuroscience · 1efd24fe Psychology · 1efd24fe

Assessment

Why?

Strongest counted support: The primary abstract directly reports Menzerath and Zipf rank-frequency patterns at levels similar to human language. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports Menzerath’s law and Zipf rank-frequency patterns in learned songs at levels similar to human language.

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.

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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.

• “Zebra finches tutored with shuffled-syllable songs produced learned songs exhibiting Menzerath's law and Zipf's rank-frequency law at levels similar to those...” · 1 claim · 29 September 2026
• “A 2026 Animal Cognition re-analysis found that zebra finches tutored with shuffled-syllable songs produced learned songs showing Menzerath's law and Zipf's...” · 2 claims · 29 September 2026

Evidence for

• The primary abstract directly reports Menzerath and Zipf rank-frequency patterns at levels similar to human language.

  From Zebra finches transform manipulated songs with shuffled syllables to exhibit linguistic laws Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The study explicitly tested whether shuffled-syllable tutoring produced three language-efficiency laws.

  From Zebra finches transform manipulated songs with shuffled syllables to exhibit linguistic laws Read 2026-09-29 Relevance MODERATE Steps 0 Counted

• Scienmag reports that scrambled-song tutoring was followed within one generation by learned songs exhibiting two statistical laws associated with human language.

  From Zebra finches restructure scrambled songs, revealing universal linguistic laws Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The passage directly reports Menzerath’s law and Zipf rank-frequency patterns in learned songs at levels similar to human language.

  From Zebra finches transform manipulated songs with shuffled syllables to exhibit linguistic laws Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
d6288099		2e13c1ab

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	eff55e21, 42b3e708, 2e13c1ab

Summary

Contribution history

seq	event	detail
21711	APPENDED
21712	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21725	LINK_EVIDENCE	by 1efd24fe (accepted)
21727	LINK_EVIDENCE	by 1efd24fe (accepted)
21743	LINK_EVIDENCE	by 1efd24fe (accepted)
24983	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "4b8a36e2-cf80-869e-83c6-c5db43e452cf",
  "links": [
    {
      "kept": "f335e0d6-9eb0-806e-a7d3-51c62e13c1ab",
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      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "f7014f90-9772-8a97-aab3-5219d6288099",
      "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": "596bd6b8-b0e9-89af-94ef-951c0d94e135",
      "group": null,
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      "source_type": "SECONDARY_TEXT",
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      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "9d1f3454-362d-8150-b6df-639842b3e708",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "ac8da940-89e8-8695-a097-63021f3be33d",
      "direction": "SUPPORT",
      "magnitude": "0.540000",
      "relevance": "MODERATE",
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      "group": null,
      "edition": "NAMED_OR_UNRELATED",
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      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
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      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
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      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0422",
    "permissive": "0.9965",
    "conservative": "0.9543"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "COMPARATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9871",
  "provisional": true,
  "evidence_sum": "4.340000",
  "snapshot_seq": 24984,
  "prior_log_odds": "0.000000",
  "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": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
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        "f335e0d6-9eb0-806e-a7d3-51c62e13c1ab"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "4.340000",
  "not_applicable_reason": null,
  "independence_unreviewed": 4
}