Kant’s claims about supersensible objects, and his account of the epistemic status of such claims, remain poorly understood, to the detriment of our understanding of Kant’s metaphysical and epistemological system. In the Critique of Practical Reason, and again in the Critique of Judgment, Kant claims that we have practical cognition (Erkenntnis) and knowledge (Wissen) of the moral law and of our supersensible freedom; that this cognition and knowledge cohere with, yet go beyond the limits of, our theoretical cognition; and that (...) this knowledge grounds rational belief (Vernunftglaube) in the existence of God, the immortality of our soul, and the real possibility of the “highest good.” This essay untangles some of these claims about practical cognition, practical knowledge, and practical belief and their relation to Kant’s account of theoretical cognition and theoretical knowledge. There is a core conception of cognition and knowledge underlying the accounts of theoretical cognition and practical cognition, which allows for a principled distinction between cases of practical knowledge and practical belief. Kant’s doctrine of the “fact of reason” turns out to be crucial to his claims about legitimacy of and distinction between the two forms of practical cognition, one which constitutes knowledge and another which cannot. (shrink)

Kant says that it can be rational to accept propositions on the basis of non-epistemic or broadly practical considerations, even if those propositions include “transcendental ideas” of supersensible objects. He also worries, however, about how such ideas (of freedom, the soul, noumenal grounds, God, the kingdom of ends, and things-in-themselves generally) acquire genuine positive content in the absence of an appropriate connection to intuitional experience. How can we be sure that the ideas are not empty “thought-entities (Gedankendinge)”—that is, speculative fancies (...) that do not and perhaps even cannot have referents in reality? In this paper I argue for an account of the fundamental problem here (i.e. that it is based in a concern about whether or not the objects of such ideas are "really possible" in Kant's technical sense). I then critically evaluate Kant's three proposed solutions to the problem. The third one involves an appeal to the complicated doctrine of "symbolization" that becomes prominent in Kant's later works. -/- . (shrink)

Kant's philosophy of arithmetic / by Charles Parsons -- Visual geometry / by James Hopkins -- The proof-structure of Kant's transcendental deduction / by Dieter Henrich -- Imagination and perception / by P.F. Strawson -- Kant's categories and their schematism / by Lauchlan Chipman -- Transcendental arguments / by Barry Stroud -- Strawson on transcendental idealism / by H.E. Matthews -- Self-knowledge / by W.H. Walsh -- The age and size of the world / by Jonathan Bennett.

First published in 2002. Routledge is an imprint of Taylor & Francis, an informa company.

Argues, first, that there is a common ground in a methodological sense in the similarity of structure in Kant’s three Critiques. Also contends that central to Kant’s metaphysics and argumentative strategy is the assumption that there is an ontological common ground uniting subjects and objects, and that this is consistent with the regressive form of Kant’s transcendental deductions and his doctrine of transcendental idealism. In addition, argues that Kant’s philosophy as a whole seeks to show how there can be a (...) common ground of agreement between the truths of common sense, philosophy, modern science, and rational morality. While providing an overview of the book, the Introduction also discusses the special interpretative difficulties of Kant’s Critical philosophy. (shrink)