Are there pure forms of thought?

pp. 358-366

in: Moritz Schlick, General theory of knowledge, Berlin, Springer, 1974

Abstract

We come now to examine the last possibility that might still hold out some hope of an a priori knowledge of reality. Perhaps concepts can supply what intuition is unable to provide. Perhaps Kant is right when he says that our thought can make apodictically valid judgments about empirical reality because thought itself participates in the construction of empirical objects, because nothing can become an object for us without having been given its form by the categories.