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Beyond the Formalist Criterion of Cognitive Significance: Philipp Frank’s Later Antimetaphysics

This article considers the development of Philipp Frank’s opposition to metaphysics in the light of the contention that there also was a long-standing pragmatic strand to the theorizing about science in the Vienna Circle. It is argued that the later Frank did not only distinguish metaphysical statements from those deemed simply cognitively meaningless by a substantive criterion but that in order to identify the latter he also sought to employ a practical rather than a formal criterion with which he and Neurath had long been acquainted.