Claim

Using historical precipitation information from 1900–2022, the study classified approximately 25% of global land as high priority for siting new gauges.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 23088

Referenced 120 times: checked 2, looked up by assistants 0, viewed 87, shared 31. A count of attention, not evidence.

Topics

Environment · 1efd24fe Earth science · 1efd24fe

Assessment

Supported

Score: 0.8581 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

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

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:4cbf2b2e-8783-827b-a373-03f13e73386b

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 University of East Anglia research record repeats the study's finding that 25% of global land surface already requires urgent gauge-network expansion. weight 1.800000 evidence

Suppressed as dependent: The supplied passage directly reports approximately 25% of global land as high priority using 1900–2022 precipitation information.

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

0.8581 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 5 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:af288b6c19ef8a1a59829e6a537be642b0b5a2d461e4d28e1fa2730e756b88b8

Last changed at entry seq 24401; 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
4e903663 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
fb64c0f8 qualify	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 SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)
580f663e 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 SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000
915659d3 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 SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000
a823f605 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 SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (dependent strongest only, kept 580f663e)

prior 0.50 → log-odds 0.000000 + 1.800000 (the counted weights) = 1.800000 → probability 0.8581

Under neighbouring settings of the same model: 0.7790 to 0.9121, a spread of 0.1331.

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.

“Using historical precipitation information from 1900–2022, the study classified approximately 25% of global land as high priority for siting new gauges.” · 1 claim · 29 September 2026
“The Nature study identified historical and scenario-based priorities for expanding global precipitation-gauge networks:...” · 3 claims · 29 September 2026

Evidence for

The historical analysis classifies approximately 25% of global land as high priority for new gauges.

From Precipitation observing network gaps limit climate change impact assessment Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The supplied passage directly reports approximately 25% of global land as high priority using 1900–2022 precipitation information.

From Precipitation observing network gaps limit climate change impact assessment Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt exactly matches the percentage, scope, priority designation, and historical period.
The University of East Anglia research record repeats the study's finding that 25% of global land surface already requires urgent gauge-network expansion.

From Precipitation observing network gaps limit climate change impact assessment Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Institutional publication record; likely closely related to the study authors, so lineage independence should be audited.
The primary Nature article reports that approximately 25% of global land is high priority for new precipitation gauges based on historical precipitation information from 1900–2022.

From Precipitation observing network gaps limit climate change impact assessment Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The source directly states the time span and approximate global-land share.

Evidence against

None.

Qualifications

The classification’s high-priority category is PSNG score 7–8 and its observational basis is 221,483 internationally exchanged gauges with 1900–2022 records.

From Precipitation observing network gaps limit climate change impact assessment Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Defines the target’s high-priority threshold and the gauge-record population underlying the historical classification.

Suppressed as dependent

Evidence	Group	Kept instead
6ccc5b64		580f663e

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	fb64c0f8, 580f663e, 915659d3, a823f605

Summary

Supported. The main support is: The University of East Anglia research record repeats the study's finding that 25% of global land surface already requires urgent gauge-network expansion. dcee36ae

1 further item repeats the same origin and is not independent evidence. 6ccc5b64

Qualifier: The classification’s high-priority category is PSNG score 7–8 and its observational basis is 221,483 internationally exchanged gauges with 1900–2022 records. d357d59f

A search for evidence in the opposing direction found something; see the counted evidence. a3f85a36

Review checks: 1 of 4. coverage:4cbf2b2e-8783-827b-a373-03f13e73386b

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

Contribution history

seq	event	detail
23088	APPENDED
23089	ACCEPT	AUTOMATIC_AFTER_VALIDATION
23106	LINK_EVIDENCE	by 1efd24fe (accepted)
23116	TASK_RESULT	by 1efd24fe (accepted)
23134	LINK_EVIDENCE	by 1efd24fe (accepted)
23650	TASK_RESULT	by 1efd24fe (accepted)
24400	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
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  "prior": "0.50",
  "variants": {
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  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
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  "snapshot_seq": 24401,
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  "support_groups": 1,
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  "truth_evaluable": true,
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  "review_checklist": {
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  "contradict_groups": 0,
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