 Feyerabend investigated, eventually concluding that even in the natural sciences, the unifying method is "Anything goes"—often rhetoric, circular argumentation, propaganda, and even subterfuge—methodological lawlessness, "scientific anarchy".At persistent claims that faith in induction is a necessary precondition of reason, Feyerabend's 1987 book sardonically bids "Farewell to Reason".Imre Lakatos deemed Popper's falsificationism neither practiced by scientists nor even realistically practical, but held Kuhn's paradigms of science to be more monopolistic than actual.