Perialetheia

We publish what we measured, the uncertainty on it, and what we have not measured.

Perialetheia applies formal measurement science - the International Vocabulary of Metrology, the GUM uncertainty framework, and ISO/IEC 17025 - to belief displacement in the information environment. Every figure here is traceable to a named source. Every quantity we have not yet evaluated is stated as unevaluated rather than omitted.

Framework
CWIMF
Measurands
BDI · NCS · CAV · ISRG
Reference standard
VFRB
Host institution
Faculty of Technical Sciences, Novi Sad
Report series One contested figure re-audited each month. Every report is archived and citable.
  1. No. 2
    The Brexit £350m claim

    Belief in the £350m figure is widely reported as having hardly shifted since the referendum. The two readings behind that comparison do not share a base, and neither stability nor decline survives rebasing.

    Current PERIALETHEIA-CWIAL-2026-02 doi:10.5281/zenodo.22303739
  2. No. 1
    GM food safety beliefs in Europe

    The fall in European concern about GM food between 2005 and 2019 spans an undocumented change of question format. On the instrument that stayed constant, the readings barely moved. An instrument change was read as a change in belief.

    Amended PERIALETHEIA-CWIAL-2026-01 doi:10.5281/zenodo.22302286
Two-page overview (PDF)what the laboratory is, and what it has found
Orientation · for readers new to the laboratory

What this laboratory is

Two ideas underlie everything here. One is a framework for treating belief as a measured quantity; the other is the laboratory that applies it. Neither requires prior familiarity with metrology or with information conflict.

CWIMF - the measurement framework

The Cognitive Warfare Information Metrology Framework treats a claim circulating in the information environment the way a laboratory treats any measurand. A proposition is anchored to a verified truth value; the prevalence of belief in it is measured against that anchor; and the result is reported with a full uncertainty budget in the sense of the Guide to the Expression of Uncertainty in Measurement (GUM). The central quantity is belief displacement: how far a population’s belief sits from what the verified evidence supports. Displacement is reported the way any measurement is, with a stated coverage interval and an explicit account of what has not been evaluated. The framework borrows its discipline directly from formal metrology - the International Vocabulary of Metrology (VIM), the GUM, and the laboratory-competence standard ISO/IEC 17025 - so that a figure about belief carries the same traceability a calibration certificate does.

CWIAL - the laboratory

Perialetheia is a Cognitive Warfare Information Analysis Laboratory: the first working instance (No. 1) that applies the framework to real cases. Where CWIMF is the method written down, CWIAL is the bench on which measurements are actually made - references verified, instruments calibrated, and reports issued clause by clause under an ISO/IEC 17025 structure. Each monthly report re-audits one contested figure from the public record and states what can, and what cannot yet, be measured from it.

Belief displacement
The signed distance between measured belief and the belief the verified evidence would support. The laboratory’s primary measurand.
Verified reference
A proposition with a stated truth value and a documented source chain. Every measurement is referred to one.
Uncertainty budget
The itemised account of every source of doubt in a figure, combined per GUM. No result is published without one.
Declared gaps
Quantities the record cannot yet support are stated as unmeasured - never omitted, never estimated.

The name Perialetheia joins peri‑ (around, concerning) with alētheia (truth, literally un‑concealment). The laboratory measures how belief stands in relation to what is verified, and treats every gap in that relation as something to be declared rather than hidden.

Perialetheia · Cognitive Warfare Information Analysis Laboratory No. 1 Belief Displacement in the Brexit £350m Claim (Report No. 2) · Report PERIALETHEIA-CWIAL-2026-02
doi:10.5281/zenodo.22303739 · https://perialetheia.org/#cwial-2026-02
Verified reference: register v0.1.0, doi:10.5281/zenodo.22277183 · software: Starter Kit 0.3.0, doi:10.5281/zenodo.22288415
§7.8 - Reporting of results · Monthly report No. 2

The Brexit £350m claim

One displacement that can be measured, and one comparison, widely repeated, that cannot be made at all.

Report series
  1. No. 1 GM food safety beliefs in Europe amended · archive
  2. No. 2 The Brexit £350m claim current
Principal finding

The claim that belief in the £350m figure has hardly shifted since the referendum rests on setting 47% (2016) beside 42% (2018). The two readings do not share a base. The 2016 figure is the proportion of all GB adults who thought the claim true. The 2018 figure is the proportion of those who had heard it. Rebase either onto the other and the resulting interval contains the other wave’s reading. Neither stability nor decline can be established from the published record. The two waves also differ in mode, in age range, and in awareness, which fell eleven points between them.

Tested claim - proposition F
“The UK sends £350 million per week to the European Union.”
Verified true value V(F) = FALSE · VFRB tier 2
£350m is a gross figure taken before the UK rebate. For 2016/17 HM Treasury reports a gross contribution of £16.9bn, about £325m per week; £12.2bn after the £4.8bn rebate, about £235m per week; and £8.1bn net of public-sector receipts, about £156m per week. The UK Statistics Authority concluded on 21 April 2016 that the figure’s use was potentially misleading, and stated on 27 May 2016 that continued use of a gross figure in a context implying it was net was misleading and undermined trust in official statistics. The Authority issued no net estimate of its own, and none is attributed to it here.
Declared shortfall in the source chain
This laboratory requires at least three independent sources for a truth value. Two stand behind V(F): the UK Statistics Authority and HM Treasury. They are not fully independent, since the Authority is commenting on Treasury and ONS figures. The 2018 survey is not counted among them: it is the measuring instrument, and it is registered as one. The shortfall is stated rather than made up by counting the instrument as a reference.

Why the comparison does not close

Respondents in 2018 who had not heard the claim were not asked whether they believed it. What share of them would have endorsed it on being shown it is unmeasured, and it is the whole of the gap between the two bases. Bounding that share at nothing and at everything gives the widest interval the record permits, and that interval is wider than the change under discussion.

2016 reading · telephone, all adults 18+ 2018 reading · online panel, adults 18-75
BASE: ALL GB ADULTS 2018 rebased: 28% - 61% 47% BASE: CLAIM-AWARE SUBSAMPLE 2016 rebased: 32% - 60% 42% 0%20%40% 60%80%100%
Each wave’s reading, and the other wave’s reading expressed on that base. Both intervals contain the point they are compared against, so the sign of the change is not determined. The bands are bounds on an unmeasured quantity, not coverage intervals.
Source record
WaveBase and modeReadingAwaren
Ipsos MORI Political Monitor, 11-14 June 2016All GB adults 18+ · telephone47%78%1,257
Brexit Misperceptions, October 2018Claim-aware subsample, GB 18-75 · online panel42%67%>2,200

Anchor measurement

The 2018 wave asks belief in F directly of respondents who report awareness of it, so it maps onto the proposition without a bridging assumption, provided the population is stated as what it is: the claim-aware subpopulation, not the electorate. A displacement can be computed from it. A rate of change cannot, for the reason above.

Belief prevalence p - claim-aware subsample, 2018
0.42
Aligned prevalence p⁰, where V(F) = FALSE
0
BDI = p − p⁰
+0.42
Type A uncertainty uA (Deff = 1.8, declared)
0.017
Type B components uB1…uB5, combined
0.074
Combined standard uncertainty uc
0.076
Expanded uncertainty U (k = 2)
0.153

Source: Policy Institute at King’s College London / Ipsos MORI / UK in a Changing Europe, Brexit Misperceptions, October 2018. Two-thirds (67%) had heard the claim; 42% of those believed it true. The claim-aware base of roughly 1,470 is derived from published percentages - no such base is published directly - and is not the precise figure it looks like. The design effect is a declared assumption for a quota-controlled online panel, evaluated separately from the face-to-face probability design of Report No. 1, and is not a measured value for either.

Capability of the procedure - not a decision
Critical value (1.645 uc)
0.126
Minimum detectable displacement (3.29 uc)
0.251
Response threshold (3.645 uc)
0.278
|BDI| as a multiple of the response threshold
1.51×
Decision against a zero-prevalence null
not issued

These figures characterise what the instrument can resolve. They are not a verdict. A null of zero prevalence for a verified-false proposition cannot be prepared - no population has ever held such a belief at zero - so u0 cannot be measured and no decision is issued against it. The response threshold is quoted at 3.645 uc, the 95%-power point under the criterion |BDI| > U, which does not coincide with the Currie value of 3.29 u0 reported for comparability with the detection-capability literature.

Not yet measured - and therefore not stated
Harmonisation term across the 2016→2018 base change
-
Endorsement rate among those not previously aware
-
ΔBDI and Cognitive Attack Velocity
-
Mode effect, telephone against online panel
-
Population term, 18+ against 18-75
-
Endogeneity of the claim-aware population to the campaign
-

The first two are the same quantity seen from either side, and they are the ones worth having. In 2016 belief was asked of every respondent regardless of awareness, so that rate was measurable then; it is not reported for 2018. Recovering it from the 2016 data tables would close the comparison, and is the next piece of work on this case. The last item is the awkward one: the population is defined by an awareness screen, and awareness is moved by the campaign being measured, so the denominator is not independent of the thing under study.

§7.8.2 - Data, reproducibility and citation

Take the numbers and check them yourself

The full uncertainty budget, the rebasing bounds, and the capability figures are published in machine-readable form with a script that regenerates every number in this report from its declared inputs. As in the amended Report No. 1, the Type B evaluation is the on-page reading rather than a provisional annex.

The verified reference this report is traceable to is archived and citable: Verified Factual Reference Base and instrument registry, version 0.1.0 (doi:10.5281/zenodo.22277183). The measurement software is archived separately as CWIAL Starter Kit 0.3.0 (doi:10.5281/zenodo.22288415). These are version identifiers, not the series identifiers: they resolve to the exact state these figures were computed against, and will not move when a later release is deposited.

Cite this report PERIALETHEIA-CWIAL-2026-02

Urekar, M. (2026). Belief Displacement in the Brexit £350m Claim (Report No. 2). Perialetheia - Cognitive Warfare Information Analysis Laboratory No. 1. Report PERIALETHEIA-CWIAL-2026-02. Zenodo. https://doi.org/10.5281/zenodo.22303739

@techreport{urekar2026cwial02,
  author      = {Urekar, Marjan},
  title       = {Belief Displacement in the Brexit {\pounds}350m Claim (Report No. 2)},
  institution = {Perialetheia - Cognitive Warfare Information Analysis Laboratory No.~1},
  year        = {2026},
  number      = {PERIALETHEIA-CWIAL-2026-02},
  note        = {Uncertainty budget after JCGM 100:2008 (GUM); capability after Currie 1968 / ISO 11843-1},
  doi         = {10.5281/zenodo.22303739},
  url         = {https://doi.org/10.5281/zenodo.22303739}
}
Download .bib Download .ris
Perialetheia · Cognitive Warfare Information Analysis Laboratory No. 1 Belief Displacement in European GM-Food Safety Discourse (Report No. 1) · Report PERIALETHEIA-CWIAL-2026-01
doi:10.5281/zenodo.22302286 · https://perialetheia.org/#cwial-2026-01
Verified reference: register v0.1.0, doi:10.5281/zenodo.22277183 · software: Starter Kit 0.3.0, doi:10.5281/zenodo.22288415
Archive · Monthly report No. 1 · amended 25 August 2026

GM food safety beliefs in Europe

A measurement error in the public record, and one anchor measurement that survives it.

Amendment · supersedes the reading published 29 July 2026

Base. The anchor item in EB 73.1 was administered on a split ballot, so its base is the half-sample of approximately 15,600, not the full wave of 31,238. The Type A uncertainty on the anchor is accordingly 0.005, not the 0.004 first published. The displacement itself is unchanged at +0.59. The original figure is recorded here rather than removed. The n column in the source record reports wave size; for EB 73.1 the item base is the split-ballot half-sample.

Wave attribution. The 2005 concern rating is Special Eurobarometer 238 (wave EB 64.1), not EB 64.3. The biotechnology-series wave EB 64.3 is a separate citation and was previously conflated with it. The 2010 EFSA wave is EB 73.5.

Item wording. The anchor is disagreement with a positively worded safety statement, not agreement with a negatively worded one. The distinction matters because acquiescence bias pushes the two in opposite directions, and the earlier description had it the wrong way round.

Budget. The Type B evaluation is complete and is now the on-page reading rather than a working annex.

Principal finding

The widely cited collapse in European concern about GM food - from 63% (2005) to 27% (2019) - spans an undocumented change of survey instrument. On the instrument used in 2005 and 2010, the readings were 63% and 66%: essentially unchanged. The 2019 and 2022 waves switched to a different question format that mechanically lowers every item on the list. No part of the apparent decline can be attributed to belief change until the two formats are harmonised. In metrological terms, an uncharacterised change in the measuring instrument was read as a change in the measurand.

Tested claim - proposition F
“Consuming approved GM food is dangerous to human health.”
Verified true value V(F) = FALSE · VFRB tier 1
The World Health Organization, the EFSA GMO Panel, and the US National Academies of Sciences, Engineering and Medicine (2016 review) each conclude that approved GM foods on the market present no greater risk to human health than their conventional counterparts.
Health-agreement item Concern-rating item Selection-from-list item Four-judgement battery (1996, 1999)
0% 20% 40% 60% 80% INSTRUMENT CHANGED rating scale → selection from 15 63% 66% 59% 27% pending 2005 2010 2019 2022
Published Eurobarometer readings, grouped by the instrument that produced them. Readings from different formats are not on a common scale and are not joined.
Source record
WaveQuestion formatReadingnBloc
EB 46.1 (1996) · GESIS ZA2899Four-judgement battery - “a risk for society”67%~16,000D
EB 52.1 (1999) · GESIS ZA3205Four-judgement battery - “a risk for society”73%~16,000D
Special EB 238 / EB 64.1 (2005)Concern rating - GM ingredients63%~25,000B
EFSA wave, EB 73.5 (2010)Concern rating - GM ingredients66%26,691B
EB 73.1 (2010)Health safety - disagreement with a positively worded statement59%31,238 (item base ~15,600)A
Special EB (2019)Selection from 15-item concern list27%27,655C
Special EB (2022)Selection from 15-item concern listpending26,509C

The only pair that is one instrument read twice

Bounding how fast this belief can move organically requires two readings of an instrument that did not change between them. The 2005 and 2010 concern ratings do not qualify: the list grew from 14 items to 17, the wording moved from products to organisms, and the population went from EU-25 to EU-27. A report that treats a change of referent as a change of instrument cannot treat three simultaneous changes as none.

One pair does qualify. The four-judgement battery of 1996 and 1999 - useful, a risk for society, morally acceptable, should be encouraged - was administered unchanged, and its risk for society item rose from 67% to 73% across 37 months of fieldwork. That is 1.95 percentage points a year, disclosed here as 2.0 to stay conservative. Two things must be said alongside it. The direction is upward, against the received narrative of declining concern. And the share expressing no view rose from 12% to 20% over the same interval, which inflates the agreeing share among those who answered.

What the rate bound yields

At most 2.0 pp/yr of organic movement over the nine years from 2010 to 2019 accounts for 18 of the 39-point gap between the 66% and 27% readings. At least 21 points - 54% of the gap - is instrument. This is a bound, not a decomposition: it is the least that can be attributed to the change of format, not the most.

The 1996 and 1999 marginals are extracted from the GESIS codebooks (ZA2899, ZA3205) and are not available from secondary sources. Anyone checking this result should go to the codebooks, and this laboratory would rather be corrected than believed.

Anchor measurement

One wave asks directly about health safety and therefore maps onto proposition F without a bridging assumption. It is the only wave from which a belief displacement can currently be computed.

0 · aligned with truth +1 U = 0.110 (k = 2) BDI = +0.59
The Type A uncertainty on this reading is 0.005 - narrower than the marker itself. The band shown is the expanded uncertainty U = 0.110 at k = 2, which the completed Type B evaluation has since supplied. At launch this region marked the absence of an interval rather than an interval.
Belief prevalence p - EB 73.1, 2010
0.59
Aligned prevalence p⁰, where V(F) = FALSE
0
BDI = p − p⁰
+0.59
Type A uncertainty uA (Deff = 1.8, declared)
0.005
Type B components uB1…uB5, combined
0.055
Combined standard uncertainty uc
0.055
Expanded uncertainty U (k = 2)
0.110

Source: Gaskell et al., Europeans and Biotechnology in 2010, Eurobarometer 73.1 (Special EB 341), wave n = 31,238; split-ballot item base ~15,600. Topic awareness 84%. The design effect is a declared assumption for a multi-country face-to-face probability design, evaluated separately from the online panel of Report No. 2, and is not a measured value for either.

Capability of the procedure - not a decision
Critical value (1.645 uc)
0.090
Minimum detectable displacement (3.29 uc)
0.181
Response threshold (3.645 uc)
0.201
Decision against a zero-prevalence null
not issued
Not yet measured - and therefore not stated
Point harmonisation term across the 2010→2019 format change
-
Cognitive Attack Velocity
-
Projected time to threshold
-
Per-country breakdowns
-

Four items that stood here at launch have since been evaluated and moved onto the page above: the Type B components, the combined and expanded uncertainty, the detection capability, and the 1996 and 1999 waves. The format share of the 2010→2019 gap is now bounded at 54% or more - but a bound is not a point value, and the harmonisation term itself remains unmeasured. A number stated before it is measured is not a measurement, and this laboratory does not publish one.

§7.8.2 - Data, reproducibility and citation

Take the numbers and check them yourself

The uncertainty budget behind this report is published in machine-readable form together with a script that regenerates every figure from its declared inputs. As of the August 2026 amendment the Type B evaluation is settled and is the on-page reading; it is no longer offered as a provisional working annex.

The verified reference this report is traceable to is archived and citable: Verified Factual Reference Base and instrument registry, version 0.1.0 (doi:10.5281/zenodo.22277183). The measurement software is archived separately as CWIAL Starter Kit 0.3.0 (doi:10.5281/zenodo.22288415). These are version identifiers, not the series identifiers: they resolve to the exact state these figures were computed against, and will not move when a later release is deposited.

Cite this report PERIALETHEIA-CWIAL-2026-01

Urekar, M. (2026). Belief Displacement in European GM-Food Safety Discourse (Report No. 1). Perialetheia - Cognitive Warfare Information Analysis Laboratory No. 1. Report PERIALETHEIA-CWIAL-2026-01. Zenodo. https://doi.org/10.5281/zenodo.22302286

@techreport{urekar2026cwial01,
  author      = {Urekar, Marjan},
  title       = {Belief Displacement in European GM-Food Safety Discourse (Report No. 1)},
  institution = {Perialetheia - Cognitive Warfare Information Analysis Laboratory No.~1},
  year        = {2026},
  number      = {PERIALETHEIA-CWIAL-2026-01},
  note        = {Uncertainty budget after JCGM 100:2008 (GUM); detection after Currie 1968 / ISO 11843-1},
  doi         = {10.5281/zenodo.22302286},
  url         = {https://doi.org/10.5281/zenodo.22302286}
}
Download .bib Download .ris
§7.2 - Selection and validation of methods

How a measurement is made

Five stages, in order. Each one has to complete before the next is meaningful.

  1. Anchor the claimMatch the claim to a Verified Factual Reference Base entry: a proposition with a stated truth value, a documented source chain of at least three independent Grade I–II sources, and a re-verification date.
  2. Define the population and the instrumentState exactly who is being measured and with what. A survey question format is an instrument; changing it changes the reading. This is where most published trend claims fail.
  3. Compute the displacementBelief prevalence minus the prevalence that would align with the verified truth. For a verified-false proposition this is the prevalence itself.
  4. Build the uncertainty budgetType A from the sampling. Type B for reference classification risk, instrument bias, temporal mismatch, representativeness, and adversarial adaptation. Combine per GUM.
  5. Report, including the gapsAn ISO/IEC 17025 clause 7.8 report: measurand, reference, method, budget, result with coverage factor, detection capability, and an explicit statement of what was not evaluated.
§7.2.1 - Traceability to published standards

The standards this laboratory works to

Every term used here maps onto an established measurement standard. Nothing in the method is invented where an accepted definition already exists.

JCGM 200:2012 VIM - International Vocabulary of Metrology

Supplies the core concepts: measurand, reference, calibration, traceability. A belief measurement is defined against a measurand and a reference exactly as any physical measurement is.

JCGM 100:2008 GUM - Guide to the Expression of Uncertainty in Measurement

Supplies the uncertainty budget: Type A and Type B components, combination in quadrature, coverage factor and expanded uncertainty. Every reported figure carries a budget built this way.

ISO/IEC 17025:2017 Competence of testing and calibration laboratories

Supplies the reporting discipline. Reports follow the clause 7.8 structure: measurand, method, budget, result with coverage factor, and an explicit statement of what was not evaluated.

Currie 1968 · ISO 11843-1:1997 Capability of detection

Supplies the decision rule: the critical value a displacement must exceed to be distinguished from zero, and the minimum detectable displacement of the instrument. Both characterise what the instrument can resolve rather than what a population believes. Where the null state cannot be physically prepared - no population has ever held a false belief at zero prevalence - this laboratory reports them as capability statements, and rests its substantive claims on differences, where a null of no change is attainable.

ISO/IEC 42001:2023 AI management systems

Governs the AI components the laboratory uses as instruments - the language-model classifiers that score narrative consistency and screen sources. It requires that each be validated before use, operated with documented uncertainty, and monitored for bias and drift, so that a figure produced with the help of a model carries the same accountability as one from any other instrument.

Where this laboratory departs from a standard, it says so and why. Where it follows one, the mapping above is the audit trail.

Archived outputs · citable with a DOI

The register and the toolkit

The reference base every measurement here is traceable to, and the software that computes the budgets, are deposited as versioned records with permanent identifiers. Each release is archived separately; the identifiers below resolve to the current version.

Sources in the register support the truth value of a proposition and nothing else. The survey or classifier used to read belief is the measuring instrument and is recorded in the instrument registry, never counted as a source for the reference. Where an entry falls below the three-source working minimum, the shortfall is stated in the entry rather than made up with additional citations.

The monthly reports are deposited as their own records and carry their own identifiers: Report No. 1, doi:10.5281/zenodo.22302286, and Report No. 2, doi:10.5281/zenodo.22303739. Each cites the register version and the software release its figures were computed against.

Development happens in the open: the toolkit repository and this site repository. The archived records are the citable form; the repositories are the working one.

Cite the register doi:10.5281/zenodo.22277183

Urekar, M. (2026). Verified Factual Reference Base and instrument registry of the Cognitive Warfare Information Analysis Laboratory No. 1 (version 0.1.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.22277183

Cite the toolkit doi:10.5281/zenodo.22288415

Urekar, M. (2026). CWIAL Starter Kit: an ISO/IEC 17025-aligned toolkit for cognitive warfare information metrology (version 0.3.0) [Computer software]. Zenodo. https://doi.org/10.5281/zenodo.22288415

Two kinds of identifier are in use here, and they are not interchangeable. The series identifier resolves to whatever the latest release is: register doi:10.5281/zenodo.22277182, software doi:10.5281/zenodo.22288414. Use it to refer to the register or the toolkit in general. The version identifiers above name one fixed state and never move. Use those when reproducing a specific figure, which is why every report on this site cites versions rather than the series.

Publications

The method, written down

M. Urekar · Faculty of Technical Sciences, University of Novi Sad · ORCID 0000-0002-6089-9148

This is the only paper published to date; the register and the toolkit are archived separately and listed above. Further papers - the framework specification, the laboratory information-integrity study, and the empirical re-audits behind these monthly reports - will be listed here as each is published.

Participation

Working with the laboratory

No prior expertise in cognitive warfare is required. The measurement discipline is learnable; the willingness to state what you do not know is the harder part.

The laboratory is not running a public call at this time. Involvement is arranged in person, case by case, with contributors who want to apply the measurement discipline to a documented case, curate and verify references, or help calibrate the instruments the method depends on. If that interests you, get in touch directly.

Interested in contributing?
Marjan Urekar · Faculty of Technical Sciences, University of Novi Sad

urekarm@uns.ac.rs