Context
Prof. Ben Goldacre’s Bad Science framework, codified in the 2008 book and his long-running Guardian column, is the UK’s canonical popular reference for identifying unreliable medical claims. Applied to the Letby trial evidence, the framework identifies seven specific warning signs present in the Crown’s methodology.
The seven warning signs applied to Letby
- Retrospective pattern-matching without pre-registration.
- Absence of a control group.
- Hypothesis-first reasoning.
- Absence of peer review on the methodology.
- Heavy reliance on narrative over data.
- Confident inference from weak or ambiguous evidence.
- Selective reporting of evidence that fits the hypothesis.
Each sign is present in specific identified features of the Crown’s case: the shift-rota chart’s selection effect; the Roche Cobas confident inference from a screening result; the skin-signs presented as diagnostic against the Lee 1989 paper’s specificity; the Facebook-search curated subset; the notes presented out of full-document context.
Why the popular-reference framework matters
The Goldacre framework is accessible in a way formal EBM is not. It reaches audiences that specialist EBM critique does not. For CCRC reviewers, Court of Appeal judges, and wider public readers, the Goldacre framework is the bridge between specialist methodological critique and lay comprehension. The formal (Heneghan, Oxford CEBM) and popular (Goldacre, Bad Science) frameworks reach the same conclusion.
Read alongside
Prof. Ben Goldacre — biography, The Bad Science framework applied, The EBM framework applied, Prof. Carl Heneghan — biography.