Susan Stebbing’s paper “Logical Positivism and Analysis” (March 1933) was unusually critical of Wittgenstein. It put up a sharp opposition between Cambridge analytic philosophy of Moore and Russell and the positivist philosophy of the Vienna Circle to which she included Wittgenstein from 1929–32. Above all, positivists were interested in analyzing language, analytic philosophers in analyzing facts. Moreover, whereas analytic philosophers were engaged in directional analysis which seeks to illuminate the multiplicity of the analyzed facts, positivists aimed at final analysis which “proves” that there are simples. Stebbing’s paper urged Wittgenstein to recast his philosophy and 1933 abandon those components of it that linked him to the Vienna Circle.