Commentary on Kant's Critique of Pure Reason has focused intensively on the transcendental deduction of the categories – the pivotal chapter of the book that governs our understanding of much that precedes it and just about all that follows it. One simple way to understand the systematic function of the Transcendental Deduction is to appreciate that it provides an account of how the ‘two stems of human knowledge’ (A15/B29) – sensibility and understanding – must relate to one another in the production of knowledge. On Kant's view, these capacities are distinguished by their radically different modes of representation: intuition and concept. Although sensibility and understanding are fundamentally distinct – they ‘cannot exchange their functions’ – they must nevertheless cooperate in the production of knowledge: ‘Only through their unification can cognition arise’ (A51/B75–6). The task of the Deduction is to show how the categories – concepts that stem from the ‘nature of the understanding’ alone – apply necessarily to objects that can only be given in experience, and represented as given through sensible intuition.

One recent trend in Kant scholarship has been to read Kant as undertaking a project in philosophical semantics, as opposed to, say, epistemology, or transcendental metaphysics. This trend has evolved almost concurrently with a debate in contemporary philosophy of mind about the nature of concepts and their content. Inferentialism is the view that the content of our concepts is essentially inferentially articulated, that is, that the content of a concept consists entirely, or in essential part, in the role that that concept plays in a system of inferences. By contrast, relationalism is the view that this content is fixed by a mental or linguistic item's standing in a certain relation to its object. The historical picture of Kant and the contemporary debate about concepts intersect in so far as contemporary inferentialists about conceptual content often cite Immanuel Kant not only as one of the founding fathers of a tradition that leads more or less straightforwardly to contemporary inferentialism, but also as the philosopher who first saw the fatal flaws in any attempt to articulate the content of our concepts relationally.

In the Doctrine of Virtue Kant divides duties of love into three categories: beneficent activity (Wohltätigkeit), gratitude (Dankbarkeit) and Teilnehmung – commonly referred to as the duty of sympathy (MS 6: 452). In this paper I will argue that the content and scope of the third duty of love has been underestimated by both critics and defenders of Kant's ethical theory. The account which pervades the secondary literature maintains that the third duty of love includes only two components: an obligation to make use of our natural receptivity to sympathetic feelings as a means to fulfilling other duties of love, and an indirect duty to cultivate these feelings. As a result, Kant's duty of sympathy has been widely regarded as a duty whose value is derived from the way in which it serves other duties, in particular, the duty of beneficent activity, which obliges agents ‘to promote according to one's means the happiness of others in need’ (MS 6: 453). Teilnehmung has thus assumed something of a second-class status among the duties to others. My aim in this paper is to demonstrate that the prevailing account of Kant's third duty of love is incomplete.

Hans Vaihinger, in the late nineteenth century, posed a now famous trilemma for Immanuel Kant's theory of affection: (1) If things-in-themselves are the affecting objects, then one must apply the categories beyond the conditions of their application (space and time). (2) If one holds that appearances are the affecting objects, then one must hold that these appearances which are the effects of affection are themselves the causes of affection. (3) If one holds that things-in-themselves affect the noumenal self in parallel with appearances affecting the empirical self, then that which is a representation for the noumenal self must serve as a causally efficacious thing-in-itself for the empirical self's production of an empirical representation of the very same object (so-called ‘double affection’).

When Kant announces in a letter to Reinhold that he has discovered a new domain of a priori principles, he situates these principles in a ‘faculty of feeling pleasure and displeasure’ (Zammito 1992: 47). And it is indeed in his Critique of Aesthetic Judgement, named in this letter the Critique of Taste, that we find his elucidation of the relation of the principle of purposiveness to the feeling of pleasure. The kinds of judgements in which our feelings are evaluated in accordance with a principle are what Kant names reflective judgements. And while reflective judgements emerge in the third Critique to include not only judgements of taste, but also judgements of the sublime and teleological judgements of nature, in this paper I will focus on the first, as the question of the relatedness of reflection to pleasure is most pronounced in this context. There is no consensus in Kant scholarship as to what the structure of reflective judgements is, as evidenced by the widely disparate views of those such as Guyer, Allison, Pippin, Ginsborg, Lyotard, and others.

Like Kant's Critique of Pure Reason, we now have both an A- and a substantially revised B-edition of Henry Allison's commentary to and defence of that work: Kant's Transcendental Idealism: An Interpretation and Defense (Allison 1983, 2004). Unlike Kant's Critique, however, Allison's first edition is unlikely to persist as an occasional rival to the second, since reviewers rightly consider the second to have superseded the landmark scholarship of the first. Nevertheless, before Allison's first edition is entirely supplanted, I would like to save a neglected insight from its treatment of the B-deduction that is not retained in the second edition.

Kant's sustained reflections on God have received considerable scholarly attention over the years and rightly so. His provocative criticisms of the three traditional theoretical proofs of the existence of God, and his own positive proof for belief in God's existence on moral grounds, have fully deserved the clarification and analysis that has occurred in these discussions. What I want to focus on, however, is the extent to which Kant's position contains resources sufficient to answer a line of questioning about the existence of God that has recently been called the problem of the ‘hiddenness of God’ in contemporary discussions in philosophy of religion. If God exists roughly as the Judeo-Christian philosophical tradition conceives of him, it is puzzling, at least prima facie, why he does not make his existence overwhelmingly obvious to one and all, but rather is hidden from us. For if God is omnipotent, as the tradition maintains, it seems that he would have the power to reveal himself to us and, for that matter, with sufficient clarity that we would be left with no doubt about the matter. And if, as the tradition maintains further, it is important to God that we accept his existence and reject false idols who would pretend to divine status, it would seem that he has a significant reason to reveal himself to us. In short, given that God can make his existence obvious to all, and that doing so would fulfil an important purpose, why does he remain hidden from us?

Upon arriving in Auschwitz Primo Levi discovered that rational discourse, in which actions are done for reasons, was left lying on the carriage floor together with his human dignity. By responding ‘Here one doesn't ask why’, the camp guard succinctly conveys the insight that evil defies reason. This paper examines two studies of evil that are predicated on that idea: Kant's and Augustine's. It argues that their theories share an underlying formation wherein evil remains incomprehensible, except in negative terms as an absence of the reasonable. This deep similarity in the structure of the concept of evil is exceptionally striking if we bear in mind the radical difference in the scope of its application: whereas for Augustine ‘evil’ is a general metaphysical concept that concerns everything that goes wrong in creation, for Kant it is limited to agents and what they do. My argument is that the privative structure which underlies their understanding of evil stems from a shared belief in the central role of rationality in ethical discourse, and in an absolute dependence of moral responsibility on free will.

This article analyses the teleological argument justifying historical progress in Kant's Guarantee of Perpetual Peace. It starts by examining the controversies produced by Kant's claim that the teleology of nature supports the idea of a providential development of humanity towards moral progress and the possibility of achieving a cosmopolitan political constitution. It further illustrates how Kant's teleological argument in Perpetual Peace needs to be assessed with reference to two systematically relevant issues: first, the problem of coordination linked to the necessity of realizing the ‘highest good’ as a historical end of practical reason, and secondly the problem of continuity posed by the temporal limitation of all individual efforts to cultivate moral dispositions. To illustrate the implications of both issues for the teleological argument in Perpetual Peace, the article draws attention to some important developments in Kant's analysis of teleology following the Critique of Judgment.