Second-order biases about evidence—systematic distortions in how we define, value, and interpret evidence. Evidence Metabiases include: treating some forms of evidence (quantitative) as real and others (qualitative, experiential) as anecdotal; assuming more evidence always means better understanding; believing that evidence speaks for itself; ignoring that evidence is always interpreted; using "evidence-based" as a magic phrase that ends discussion. Evidence Metabiases shape what counts as evidence in the first place—and who gets to decide.
Evidence Metabiases "She says her experience isn't evidence because it's 'just anecdotal.' That's Evidence Metabias—having a definition of evidence that excludes most human knowing. Experience is evidence; it's just not the kind that fits in spreadsheets. The metabias is thinking your evidence hierarchy is natural, not constructed."
by Dumu The Void March 1, 2026
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