Claim

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 in human language.

Type COMPARATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21711 · qualifiers {"population":"Juvenile male zebra finches in the re-analyzed tutoring experiment."}

a conjunction joins clauses that may be separately evaluable

Referenced 94 times: checked 2, looked up by assistants 0, viewed 59, shared 33. A count of attention, not evidence.

Topics

Neuroscience · 1efd24fe Psychology · 1efd24fe

Assessment

Supported

Score: 0.9871 under ledger-default@0.3.0 at snapshot 27745

1 of 4 review checks done · 1 counted

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:4b8a36e2-cf80-869e-83c6-c5db43e452cf

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.Every quoted passage was confirmed on the page when Galedra fetched it.

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.

Hide calculation

0.9871 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 4 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:c7ec16f51f1783b0b2dd34e9bbd4174bce6ed87c7bffcebece4ba7dae3a93a65

Last changed at entry seq 24984; 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
eff55e21 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 2e13c1ab)
0d94e135 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
42b3e708 support	relevance MODERATE 0.6 × 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	0.540000	0.540000
2e13c1ab 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

prior 0.50 → log-odds 0.000000 + 4.340000 (the counted weights) = 4.340000 → probability 0.9871

Under neighbouring settings of the same model: 0.9543 to 0.9965, a spread of 0.0422.

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.

“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

Supported. The main support is: Scienmag reports that scrambled-song tutoring was followed within one generation by learned songs exhibiting two statistical laws associated with human language. 28141e43

1 further item repeats the same origin and is not independent evidence. d6288099

Review checks: 1 of 4. coverage:4b8a36e2-cf80-869e-83c6-c5db43e452cf

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

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

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      "reason": "dependent_strongest_only",
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      "link": "9d1f3454-362d-8150-b6df-639842b3e708",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "ac8da940-89e8-8695-a097-63021f3be33d",
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      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "189f9be1-63de-8ea5-88e7-10df0611d2eb",
      "direction": "SUPPORT",
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  "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,
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  "support_groups": 3,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
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    },
    "opposing_search_done": {
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    "independence_reviewed": {
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    "primary_source_reviewed": {
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      "ok": true
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  "contradict_groups": 0,
  "rounding_boundary": false,
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  "not_applicable_reason": null,
  "independence_unreviewed": 4
}