Note: footnote 15 is missing from the PDF and epub version currently available at Mises.org. That note should read, approximately:
15. See Kant, The Critique of Pure Reason, p. 25. Whether or not such an interpretation of Kant’s epistemology is correct is, of course, a very different matter. Clarifying such a problem, however, is not important here. For an activist or constructivist interpretation of Kantian philosophy see E. Kambartel, Erfahrung und Struktur, chapter 3; also Hoppe, Handeln und Erkennen (Bern: Lang, 1976).