Claim

The language-change study quantified model forecasting ability for dialect-pattern dynamics up to a twenty-five-year horizon using Kullback–Leibler divergence between forecasts and observations.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 18207 · qualifiers {"location":"Dialect-pattern dynamics inferred from twentieth-century US surveys.","denominator":"Forecast horizon measured with Kullback–Leibler divergence."}

Referenced 103 times: checked 2, looked up by assistants 0, viewed 65, shared 36. A count of attention, not evidence.

Topics

Society · 1efd24fe Statistics · 1efd24fe

Assessment

Supported

Score: 0.9955 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: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:51416a05-99ce-80f6-9230-fc0057fe35cb

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

Why?

Strongest counted support: The passage directly reports a 25-year forecasting horizon measured by Kullback–Leibler divergence. weight 1.800000 evidence

Suppressed as dependent: The abstract reports forecasting evaluation through twenty-five years using Kullback–Leibler divergence.

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

0.9955 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 sha256:174db340a0c38d7db7783864bb42ba0f24c405527b42c67b750e7faf19a1bbf2

Last changed at entry seq 24299; 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
ec36c7d2 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
3c2dff58 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
33a7c81d 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
bfc8021e support	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × 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	0.000000	0.000000 (dependent strongest only, kept ec36c7d2)

prior 0.50 → log-odds 0.000000 + 5.400000 (the counted weights) = 5.400000 → probability 0.9955

Under neighbouring settings of the same model: 0.9777 to 0.9991, a spread of 0.0214.

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.

“The language-change study quantified model forecasting ability for dialect-pattern dynamics up to a twenty-five-year horizon using Kullback–Leibler...” · 1 claim · 29 September 2026
“A September 2026 arXiv study modeled twentieth-century US dialect change as a statistical field and reported that migration destroys spatial patterns while...” · 2 claims · 29 September 2026

Evidence for

The abstract reports forecasting evaluation through twenty-five years using Kullback–Leibler divergence.

From Statistical physics of language change inferred from time evolving maps Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The abstract reports a twenty-five-year forecast evaluation using Kullback–Leibler divergence.

From Statistical physics of language change inferred from time evolving maps Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary arXiv abstract passage; no independent lineage yet.
The passage directly reports a 25-year forecasting horizon measured by Kullback–Leibler divergence.

From Statistical physics of language change inferred from time evolving maps Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt explicitly states the horizon and metric.
The primary paper directly states that its forecasting ability is quantified up to a twenty-five-year horizon using Kullback-Leibler divergence between forecasts and observations.

From Statistical physics of language change inferred from time evolving maps Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The source exactly supports the horizon, metric, and forecast-observation comparison.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
4fe1047f		ec36c7d2

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

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 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	ec36c7d2, 3c2dff58, 33a7c81d, bfc8021e

Summary

Supported. The main support is: The passage directly reports a 25-year forecasting horizon measured by Kullback–Leibler divergence. 15821ae7

1 further item repeats the same origin and is not independent evidence. 4fe1047f

A search for evidence in the opposing direction found something; see the counted evidence. 7474ee96

Review checks: 1 of 4. coverage:51416a05-99ce-80f6-9230-fc0057fe35cb

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

Contribution history

seq	event	detail
18207	APPENDED
18208	ACCEPT	AUTOMATIC_AFTER_VALIDATION
18217	LINK_EVIDENCE	by 1efd24fe (accepted)
18239	LINK_EVIDENCE	by 1efd24fe (accepted)
20729	TASK_RESULT	by 1efd24fe (accepted)
24298	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "51416a05-99ce-80f6-9230-fc0057fe35cb",
  "links": [
    {
      "link": "095ba07b-e399-8e4a-b261-eabeec36c7d2",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "4bcc0a40-d63e-8f3c-8316-dcb515821ae7",
      "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": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "371d9b38-2eb3-82ce-a389-cc6b3c2dff58",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "ee6b3a8d-acfe-829c-a439-dec316e4f18a",
      "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": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "c6e1c355-b3a8-8577-8f14-96fb33a7c81d",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "76182bdb-a884-8b76-b628-13acd09097a0",
      "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": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "095ba07b-e399-8e4a-b261-eabeec36c7d2",
      "link": "fe14aadb-1ebc-813f-abe2-db88bfc8021e",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "90ed84c6-cece-8dfd-ac36-fbfb4fe1047f",
      "direction": "SUPPORT",
      "magnitude": "0.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MODEL_OUTPUT",
      "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": "0.0214",
    "permissive": "0.9991",
    "conservative": "0.9777"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9955",
  "provisional": true,
  "evidence_sum": "5.400000",
  "snapshot_seq": 24299,
  "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": {
      "by": [
        "095ba07b-e399-8e4a-b261-eabeec36c7d2",
        "371d9b38-2eb3-82ce-a389-cc6b3c2dff58",
        "c6e1c355-b3a8-8577-8f14-96fb33a7c81d",
        "fe14aadb-1ebc-813f-abe2-db88bfc8021e"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "5.400000",
  "not_applicable_reason": null,
  "independence_unreviewed": 4
}