Immanuel Kant is often regarded as an exponent of the ‘individualist’ tradition in epistemology, according to which testimony is not a fundamental source of knowledge. The present paper argues that this view is far from accurate. Kant devotes ample space to discussions of testimony and, in his lectures on logic, arrives at a distinct and stable philosophical position regarding testimony. Important elements of this position consist in (a) acknowledging the ineliminability of testimony; (b) realizing that testimony can establish empirical knowledge (...) with certainty; (c) establishing a presumptive principle regarding the acceptance of testimony; (d) arguing for a symmetry between knowledge based on experience and knowledge based on testimony. Rejecting testimony as a fundamental source of knowledge merely on the basis that no theoretically necessary ground for its truth can be given, would, as Kant puts it, indicate ‘a lack of moral interest’. Such ‘incredulity’ would be a form of ‘logical egoism’: it demonstrates an unwillingness or inability to think oneself in the place of others, yet this we must do if we are to trust our own judgements. While Kant strongly endorses testimony as a source of empirical knowledge, he does, however, make one important restriction: ‘Propositions of reason’ (Vernunftwahrheiten), such as universal moral principles, may not be adopted on the basis of testimony. I argue that this distinction, between testimonial knowledge of empirical matters of fact and individual knowledge of propositions of reason, is an important element of Kant’s epistemology of testimony, as it explains how his strong endorsement of testimony as a source of knowledge can be squared with his equally strong demand for intellectual autonomy. Finally, I comment on the overall implications of this account for Kant’s discussion, elsewhere in his work, of the public nature of communication. (shrink)

The second edition of the Critique of Pure Reason contains several major and myriad minor emendations. The revision of the mode of presentation is apparent in four sections of the Critique: the Aesthetic; the Doctrine of the Concepts of the Understanding; the Principles of Pure Understanding; and ‘the paralogisms advanced against rational psychology’ . A new refutation of psychological idealism begins at B274. Perhaps most importantly, a new Preface frames the Critique.

It is commonly thought that the distinction between subjectively valid judgements of perception and objectively valid judgements of experience in the Prolegomena is not consistent with the account of judgement Kant offers in the B Deduction, according to which a judgement is ‘nothing other than the way to bring given cognitions to the objective unity of apperception’. Contrary to this view, I argue that the Prolegomena distinction maps closely onto that drawn between the mathematical and dynamical principles in the System (...) of Principles: Kant’s account of the Prolegomena distinction strongly suggests that it is the Analogies of Experience that make it possible for judgements of perception to give rise to judgements of experience. This means that judgements of perception are objectively valid with regard to the quantity and quality of objects, and subjectively valid with regard to the relation they posit between objects. If that is the case, then the notion of a judgement of perception is consistent with the B Deduction account of judgement. (shrink)

This dissertation concerns the methodology Kant employs in the first two sections of the Groundwork of the Metaphysics of Morals (Groundwork I-II) with particular attention to how the execution of the method of analysis in these sections contributes to the establishment of moral metaphysics as a science. My thesis is that Kant had a detailed strategy for the Groundwork, that this strategy and Kant’s reasons for adopting it can be ascertained from the Critique of Pure Reason (first Critique) and his (...) lectures on logic, and that understanding this strategy gains us interpretive insight into Kant’s moral metaphysics. At the most general level of methodology, Kant says there are four steps for the establishment of any science: 1) make distinct the idea of the natural unity of its material 2) determine the special content of the science 3) articulate the systematic unity of the science 4) critique the science to determine its boundaries The first two of these steps are accomplished by the genetically scholastic method of analysis, paradigmatically the method whereby confused and obscure ideas are made clear and distinct, thereby logically perfecting them and transforming them into possible grounds of cognitive insight that are potentially complete and adequate to philosophical purposes. The analysis of Groundwork I is a paradigmatic analysis that makes distinct what is contained in common understanding, i.e. its Inhalt or intension, making distinct the higher partial concepts that together define the concept of morality. The analysis of Groundwork II is an employment more specifically of the method of logical division, which makes distinct what is contained under the concept, i.e. its Umfang, by which the extension or object of morality is determined. Part I introduces Kant’s conception of moral metaphysical science and why he took it to be in need of establishment, explains the general method for establishing science and the scholastic method of analysis by which its first two steps are to be accomplished, then provides an interpretation of Groundwork I as an execution of this method. Part II details Kant’s determination of the special content of moral science in Groundwork II in relation to the central problem for moral metaphysics – how synthetic a priori practical cognition is possible. (shrink)

A critical discussion of Lu-Adler's chapter on Kant's mature view of pure general logic. I sketch an alternative interpretation of its formality on which Kant would hold no deduction is possible of this logic's laws.

In this paper, I explore the strategy of circularity employed by Kant and Husserl in their treatment of categoriality. I focus on the relation between transcendental and metaphysical deductions in Kant’s Critique of Pure Reason, and on the problem of “epistemic foundationalism” and categoriality in Husserl’s Sixth Logical Investigation. I propose that the strategy of circularity is manifested through the peculiar self-enclosure of the categories of transcendental deduction vis-à-vis metaphysical deduction (Kant) and categorial intuition vis-à-vis sensuous intuition (Husserl). Although it (...) is usually regarded as a deficient and damaging occurrence in argumentation, circularity appears to be a crucial component in the analysis of both thinkers. The analytical realms recognized by both these thinkers, are acknowledged as continually dependent upon the self-evidential “contingency” of the realms they are supposed to hierarchically overarch. The strict separation between the transcendental and phenomenological realms and their addressees appears to be founded on mutual circularity, where the relation between investigator and investigated extends beyond their separation and reconciliation. Both Kant and Husserl, through the circular relationship with empiricism-rationalism and psychologism radically re-articulated the logic-ontology and founding-founded polarities. (shrink)

O artigo tem por objetivo contribuir para a já antiga discussão sobre a relação de Kant com a metafísica expondo os diversos sentidos que esta disciplina assume na filosofia crítica. Orientada por um interesse sistemático e tendo por base o capítulo sobre a Arquitetônica da Razão Pura da Crítica da razão pura, a presente investigação procura esclarecer a reformulação por que passam na filosofia crítica kantiana as disciplinas tradicionais da metafísica racionalista, mais precisamente a metaphysica generalis e a metaphysica specialis, (...) reconfiguradas em uma analítica do entendimento e em uma fisiologia da razão, respectivamente, e ancoradas no projeto propriamente kantiano de uma Metafísica dos Costumes e uma Metafísica da Natureza. (shrink)