Claim

Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 2807

Referenced 236 times: checked 8, looked up by assistants 1, viewed 128, shared 99. A count of attention, not evidence.

Topics

Public health · 03192ed8 Medicine · 03192ed8

Assessment

Supported

Score: 0.9971 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 3 counted

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

Main unresolved issue: 10 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:a192b8eb-f3da-85f8-a870-6ed64f53b6a8

Not yet independently audited.Evidence points both ways.A quoted passage from alzheimersresearchuk.org and alzint.org was not found on the page when Galedra fetched it.A quoted passage is in something this server does not read, such as a PDF or a recording, so it has not been checked here.

Why?

Strongest counted support: Alzheimer’s Disease International summarizes the 2024 Lancet Commission as estimating that 45% of dementia cases could potentially be delayed or reduced by addressing 14 risk factors. weight 1.800000 evidence

Strongest counted contradiction: The Lancet Commission says nearly half of dementias could theoretically be prevented by eliminating 14 risk factors. weight 0.918000 evidence

Suppressed as dependent: The transcription states that conservative estimates put 45% of dementia cases as entirely preventable.

Review gaps: independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9971 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 3 of 4 · stability HIGH · 11 sources, 6 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:d4bc6cbd166f92983c4124e8086ae82bee82a586bdf3fcf041419648f31b32d1

Last changed at entry seq 14451; 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
5a66216c support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000
5e5f79a2 support	relevance STRONG 1.2 × 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	1.080000	1.080000
f1bb28c6 contradict	relevance STRONG 1.2 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.918000	0.918000
ad539e2b 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
7fc9b0c2 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.530000	0.000000 (non directional)
756f30a3 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
413c9fc6 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
9e59e8ac support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.530000	1.530000
26c7f879 qualify	relevance STRONG 1.2 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.918000	0.000000 (non directional)
3db39dec support	relevance WEAK 0.2 × observation EXPERT_ANALYSIS 0.3 × interpretation 2 steps, 1 − 0.15 × 2 0.700000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000
a1778104 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × 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 5a66216c)

prior 0.50 → log-odds 0.000000 + 5.832000 (the counted weights) = 5.832000 → probability 0.9971

Under neighbouring settings of the same model: 0.9834 to 0.9995, a spread of 0.0161.

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.

“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 28 September 2026
“Conservative estimates hold that 45 per cent of dementia cases are entirely preventable.” · 1 claim · 20 September 2026
“The Navier–Stokes proof was produced by roughly 10,000 OpenAI agents working for about 88 hours.” · 25 claims · 20 September 2026

Evidence for

Fountain Life's chief medical officer says conservative estimates put 45 per cent of dementia as preventable.

From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance WEAK Steps 2 Counted

Stated in a paid sponsor segment by the vendor's own chief medical officer, with no study cited.
The passage says conservative estimates hold that 45% of dementia cases are entirely preventable.

From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance DIRECT Steps 1 Counted

Verbatim.
The transcription states that conservative estimates put 45% of dementia cases as entirely preventable.

From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance DIRECT Steps 1 Counted
WHO says up to 45% of dementia risk is attributable to modifiable risk factors.

From New WHO guidelines: up to 45% of dementia risk could be prevented or delayed Read 2026-09-28 Relevance MODERATE Steps 0 Counted

Supports the 45% modifiable-risk estimate, but WHO phrases it as risk preventable or delayable rather than entirely preventable cases.
The Lancet says the estimated preventable fraction of dementia cases rose to 45% in 2024 after accounting for 14 modifiable risk factors.

From Rethinking risk factors for global dementia prevention Read 2026-09-28 Relevance STRONG Steps 0 Counted

Supports the 45% estimate, but the source describes an estimated preventable fraction and elsewhere frames prevention as prevent-or-delay, not guaranteed complete prevention.
The 2024 Lancet Commission directly reports that around 45% of dementia cases are potentially preventable by addressing 14 modifiable risk factors, while this is a population-level potential estimate rather than a guarantee for each individual.

From Dementia prevention, intervention, and care 2024 Read 2026-09-28 Relevance DIRECT Steps 1 Counted

First-party commission summary directly matches the claim’s quantitative estimate.
Alzheimer’s Disease International summarizes the 2024 Lancet Commission as estimating that 45% of dementia cases could potentially be delayed or reduced by addressing 14 risk factors.

From Lancet Commission identifies two new risk factors for dementia and suggests 45% of cases could be delayed or reduced Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The source preserves the Commission’s potential-risk-reduction wording rather than treating all cases as certainly preventable.
Alzheimer’s Research UK’s summary of the 2024 Lancet Commission reports that 14 modifiable risk factors account for approximately 45% of dementia cases and could prevent or delay nearly half if completely addressed.

From Addressing 14 health and lifestyle factors could prevent nearly half of global dementia cases Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The figure is a modeled population-attributable estimate and refers to prevention or delay under complete-risk-factor intervention; it does not mean every individual case is preventable.

Evidence against

The Lancet Commission says nearly half of dementias could theoretically be prevented by eliminating 14 risk factors.

From Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission Read 2026-09-20 Relevance STRONG Steps 1 Counted

The 45% figure is real but the claim inverts its epistemic status three ways: the Commission's finding is "prevented OR DELAYED", not entirely prevented; 45% is a theoretical UPPER bound assuming all 14 risk factors are wholly eliminated and every association is causal, so calling it "conservative" reverses it; and it is a population attributable fraction for modifiable risk factors, not a statement that 45% of individual cases were each avoidable. The Lancet's own press release says "prevented or delayed". Read from a full-report PDF mirror because thelancet.com returned 403; wording cross-checked against the press release.

Qualifications

The Lancet describes around 45% of dementia cases as potentially preventable through 14 modifiable risk factors.

From Dementia prevention, intervention, and care 2024 Read 2026-09-28 Relevance DIRECT Steps 1 Counted

This independent primary source supports the approximate percentage but qualifies “entirely preventable” as “potentially preventable” through risk-factor intervention.
A Canadian longitudinal study estimated that 12 modifiable risk factors accounted for 43.4% of dementia cases under weighted multiplicative assumptions.

From Prevalence and population attributable fractions of potentially modifiable risk factors for dementia in Canada Read 2026-09-28 Relevance STRONG Steps 1 Counted

Independent population analysis is close to 45% but is a modeled attributable fraction in Canada, not proof that cases are entirely preventable worldwide.

Suppressed as dependent

Evidence	Group	Kept instead
270ebb4d		5a66216c

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: 3 of 4

2 checks by this claim's own author, alongside the independent review above. 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	yes	599869ca
opposing search done	yes	1ddc708b
independence reviewed	no
primary source reviewed	yes	ad539e2b, 7fc9b0c2, 9e59e8ac, 26c7f879

Summary

Supported. The main support is: The Lancet says the estimated preventable fraction of dementia cases rose to 45% in 2024 after accounting for 14 modifiable risk factors. 1af52b0b

Against that, contradiction: The Lancet Commission says nearly half of dementias could theoretically be prevented by eliminating 14 risk factors. dac2b15b

1 further item repeats the same origin and is not independent evidence. 270ebb4d

Qualifier: The Lancet describes around 45% of dementia cases as potentially preventable through 14 modifiable risk factors. 1e4690bd

Qualifier: A Canadian longitudinal study estimated that 12 modifiable risk factors accounted for 43.4% of dementia cases under weighted multiplicative assumptions. a3183ecd

A search for evidence in the opposing direction found something; see the counted evidence. 1ddc708b

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

Contribution history

seq	event	detail
2807	APPENDED
2808	ACCEPT	AUTOMATIC_AFTER_VALIDATION
2949	LINK_EVIDENCE	by 03192ed8 (accepted)
4053	LINK_EVIDENCE	by 03192ed8 (accepted)
6614	TASK_RESULT	by 8b5e81bf (accepted)
8246	TASK_RESULT	by 1efd24fe (accepted)
10701	TASK_RESULT	by 1efd24fe (accepted)
10723	LINK_EVIDENCE	by 1efd24fe (accepted)
11194	LINK_EVIDENCE	by 1efd24fe (accepted)
11203	LINK_EVIDENCE	by 1efd24fe (accepted)
12227	LINK_EVIDENCE	by 1efd24fe (accepted)
13225	LINK_EVIDENCE	by 1efd24fe (accepted)
14450	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

{
  "claim": "a192b8eb-f3da-85f8-a870-6ed64f53b6a8",
  "links": [
    {
      "link": "04875014-e33f-837a-a71b-a00a5a66216c",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "5323b901-3e91-8887-ad6e-fde584ebe8db",
      "direction": "SUPPORT",
      "magnitude": "0.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "SELF",
      "observation": "DIRECT_TEXT",
      "source_type": "VIDEO",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 1
    },
    {
      "link": "0a9ea718-33b2-8ff1-989e-c43a5e5f79a2",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "67414eaa-8b24-83c8-8a8a-fcb81af52b0b",
      "direction": "SUPPORT",
      "magnitude": "1.080000",
      "relevance": "STRONG",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.080000",
      "interpretive_steps": 0
    },
    {
      "link": "14838406-08de-8336-ab19-311af1bb28c6",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "fc268113-40e2-847d-825b-b497dac2b15b",
      "direction": "CONTRADICT",
      "magnitude": "0.918000",
      "relevance": "STRONG",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.918000",
      "interpretive_steps": 1
    },
    {
      "link": "35806703-6566-8594-adbf-edefad539e2b",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "88f25ad4-b414-8114-8b4a-0a3782a832f6",
      "direction": "SUPPORT",
      "magnitude": "0.540000",
      "relevance": "MODERATE",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.540000",
      "interpretive_steps": 0
    },
    {
      "link": "53e4177c-0d2c-8449-a7ba-91f37fc9b0c2",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "1d885d93-cff7-88cb-8366-1f341e4690bd",
      "direction": "QUALIFY",
      "magnitude": "1.530000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 1
    },
    {
      "link": "84922ecd-907e-886a-a412-0bb2756f30a3",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "0f739811-8ff9-88d0-a66a-9e56a583f71c",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "88fabef9-7cbf-8348-80ec-6cd8413c9fc6",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "7b9b7af3-5996-8fd1-a56d-92a3cd8fff2d",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "8bb05528-7714-89e5-820c-afe79e59e8ac",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "c0fd9500-a78c-83be-877a-2579261fb360",
      "direction": "SUPPORT",
      "magnitude": "1.530000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.530000",
      "interpretive_steps": 1
    },
    {
      "link": "b2440089-9396-8508-b5d0-2eaf26c7f879",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "a1a309ae-250e-808a-b95f-39dea3183ecd",
      "direction": "QUALIFY",
      "magnitude": "0.918000",
      "relevance": "STRONG",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "MEASUREMENT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 1
    },
    {
      "link": "ccbbe176-d5b9-82b4-9b4f-f42d3db39dec",
      "group": "74f76792-52e6-8165-8e4e-e051512316f3",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "13cebd7b-2c1a-8110-8ab0-f20b131df6c0",
      "direction": "SUPPORT",
      "magnitude": "0.000000",
      "relevance": "WEAK",
      "extraction": "UNVERIFIED",
      "provenance": "SELF",
      "observation": "EXPERT_ANALYSIS",
      "source_type": "VIDEO",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 2
    },
    {
      "kept": "04875014-e33f-837a-a71b-a00a5a66216c",
      "link": "cd497fb7-2e26-82f5-8f0d-8532a1778104",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "48855d4f-74bd-81c5-882e-da7f270ebb4d",
      "direction": "SUPPORT",
      "magnitude": "0.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "SELF",
      "observation": "DIRECT_TEXT",
      "source_type": "VIDEO",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 1
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0161",
    "permissive": "0.9995",
    "conservative": "0.9834"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": true,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9971",
  "provisional": true,
  "evidence_sum": "5.832000",
  "snapshot_seq": 14451,
  "prior_log_odds": "0.000000",
  "support_groups": 5,
  "model_dependent": false,
  "review_coverage": "0.75",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [
        "01a0bc58-678c-7f9e-ad4d-1484599869ca"
      ],
      "ok": true
    },
    "opposing_search_done": {
      "by": [
        "01a0bc58-676d-710c-8e62-ae9f1ddc708b"
      ],
      "ok": true
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "35806703-6566-8594-adbf-edefad539e2b",
        "53e4177c-0d2c-8449-a7ba-91f37fc9b0c2",
        "8bb05528-7714-89e5-820c-afe79e59e8ac",
        "b2440089-9396-8508-b5d0-2eaf26c7f879"
      ],
      "ok": true
    }
  },
  "contradict_groups": 1,
  "rounding_boundary": false,
  "posterior_log_odds": "5.832000",
  "not_applicable_reason": null,
  "independence_unreviewed": 10
}