Precautionary policy enacted in the absence of established causal evidence systematically produces policy whack-a-mole: each new candidate harm (phones, video games, fluoride, vaccines, sugar) generates its own precautionary regime, the regimes accumulate, and the public-health institutions that issued them lose credibility when the underlying causal claims fail to consolidate. The means proposed in the synthesis are therefore not effective at the goal the synthesis claims to serve.