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
-
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.
-
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.
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.
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.
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
The Brexit £350m claim
One displacement that can be measured, and one comparison, widely repeated, that cannot be made at all.
- No. 1 GM food safety beliefs in Europe amended · archive
- No. 2 The Brexit £350m claim current
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.
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.
| Wave | Base and mode | Reading | Aware | n |
|---|---|---|---|---|
| Ipsos MORI Political Monitor, 11-14 June 2016 | All GB adults 18+ · telephone | 47% | 78% | 1,257 |
| Brexit Misperceptions, October 2018 | Claim-aware subsample, GB 18-75 · online panel | 42% | 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.
- 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.
- 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.
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.
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}
}
TY - RPRT AU - Urekar, Marjan TI - Belief Displacement in the Brexit GBP 350m Claim (Report No. 2) PB - Perialetheia - Cognitive Warfare Information Analysis Laboratory No. 1 PY - 2026 M1 - PERIALETHEIA-CWIAL-2026-02 DO - 10.5281/zenodo.22303739 UR - https://doi.org/10.5281/zenodo.22303739 N1 - Uncertainty budget after JCGM 100:2008 (GUM); capability after Currie 1968 / ISO 11843-1 ER -
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
GM food safety beliefs in Europe
A measurement error in the public record, and one anchor measurement that survives it.
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.
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.
| Wave | Question format | Reading | n | Bloc |
|---|---|---|---|---|
| EB 46.1 (1996) · GESIS ZA2899 | Four-judgement battery - “a risk for society” | 67% | ~16,000 | D |
| EB 52.1 (1999) · GESIS ZA3205 | Four-judgement battery - “a risk for society” | 73% | ~16,000 | D |
| Special EB 238 / EB 64.1 (2005) | Concern rating - GM ingredients | 63% | ~25,000 | B |
| EFSA wave, EB 73.5 (2010) | Concern rating - GM ingredients | 66% | 26,691 | B |
| EB 73.1 (2010) | Health safety - disagreement with a positively worded statement | 59% | 31,238 (item base ~15,600) | A |
| Special EB (2019) | Selection from 15-item concern list | 27% | 27,655 | C |
| Special EB (2022) | Selection from 15-item concern list | pending | 26,509 | C |
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.
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.
- 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.
- 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
- 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.
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.
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}
}
TY - RPRT AU - Urekar, Marjan TI - Belief Displacement in European GM-Food Safety Discourse (Report No. 1) PB - Perialetheia - Cognitive Warfare Information Analysis Laboratory No. 1 PY - 2026 M1 - PERIALETHEIA-CWIAL-2026-01 DO - 10.5281/zenodo.22302286 UR - https://doi.org/10.5281/zenodo.22302286 N1 - Uncertainty budget after JCGM 100:2008 (GUM); detection after Currie 1968 / ISO 11843-1 ER -
How a measurement is made
Five stages, in order. Each one has to complete before the next is meaningful.
- 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.
- 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.
- Compute the displacementBelief prevalence minus the prevalence that would align with the verified truth. For a verified-false proposition this is the prevalence itself.
- 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.
- 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.
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.
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.
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.
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.
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.
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.
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.
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
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.
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.
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