When AI-generated evidence becomes tomorrow's data

Provenance becomes a scientific variable. If AI-generated content is not distinguishable from direct observation, recursive reuse can blur the boundary between measured reality and prior model output. Public-health data systems should preserve origin, transformation and human-verification state so downstream analyses can detect and control recursive evidence. Weavidence Insights. Independent scholarly publication; not externally peer reviewed. AI-assisted drafting and editorial development were used. Pietro Corona remains responsible for the final published claims, source selection, interpretation and approval.