In this paper I propose a novel interpretation of Kant’s proof of the existence of the outer world in the Refutation of Idealism. According to this interpretation, Kant’s proof does not provide a regressive explanation of our capacity to determine the temporal order of our experiences. Rather, it expresses a counterfactual reflection on what it takes for something to be actual in contrast to being merely imagined. On the ground of this reflection, Kant argues against the Cartesian sceptic that, even (...) if all our representations of empirical objects other than ourselves failed to be veridical, we would still know a priori that in every situation in which we, as thinking things, actually exist, something outside us in space must necessarily exist. (shrink)

Interpreters of Kant’s Refutation of Idealism face a dilemma: it seems to either beg the question against the Cartesian sceptic or else offer a disappointingly Berkeleyan conclusion. In this article I offer an interpretation of the Refutation on which it does not beg the question against the Cartesian sceptic. After defending a principle about question-begging, I identify four premises concerning our representations that there are textual reasons to think Kant might be implicitly assuming. Using those assumptions, I offer a reconstruction (...) of Kant’s Refutation that avoids the interpretative dilemma, though difficult questions about the argument remain. (shrink)

I recently argued that critical realists ought to adopt transcendental idealism in favour of Bhaskar’s transcendental realism. In response, Dustin McWherter presents two arguments against transcendental idealism: it is inferior to transcendental realism because it cannot account for the epistemic significance of experimentation, and it is internally inconsistent because it affirms the existence of things-in-themselves. This brief reply defends transcendental idealism against both objections.

The central question of this paper is: what has Kant’s Refutation of Idealism argument proven, if anything? What is the real scandal of philosophy and universal human reason? I argue that Kant’s Refutation argument can only be considered sound if we assume that his target is what I call ‘metaphysical external-world skepticism.’ What is in question is not the ‘existence’ of outside things but their very ‘nature,’ that is, the claim that the thing outside us, which appears to us as (...) a persistent body in space, exists in itself _as a substantia noumenon_. Assuming the indirect-realist view that we only immediately know ideas and that their putative objects are known by inference, the metaphysical external-world skeptic doubts that the nature of things outside oneself is mind-independent. (shrink)

In this paper, I argue that, if transcendental arguments are to proceed from premises that are acceptable to the skeptic, the Transcendental Premise, according to which “X is a metaphysically necessary condition for the possibility of Y,” must be grounded in considerations of conceivability and possibility. More explicitly, the Transcendental Premise is based on what Szabó Gendler and Hawthorne call the “conceivability-possibility move.” This “inconceivability-impossibility” move, however, is a problematic argumentative move when advancing transcendental arguments for the following reasons. First, (...) from “S cannot conceive of P” it doesn’t necessarily follow that P is inconceivable. Second, from “P is inconceivable” it doesn’t necessarily follow that P is metaphysically impossible. Third, rather than block skeptical doubts, the conceivability-possibility move introduces skeptical doubts. For these reasons, transcendental arguments fail to deliver on their promise to overcome skeptical doubts. (shrink)

Technology is not only an object of philosophical reflection but also something that can change this reflection. This paper discusses the potential of computer-supported argument visualization tools for coping with the complexity of philosophical arguments. I will show, in particular, how the interactive and web-based argument mapping software “AGORA-net” can change the practice of philosophical reflection, communication, and collaboration. AGORA-net allows the graphical representation of complex argumentations in logical form and the synchronous and asynchronous collaboration on those “argument maps” on (...) the internet. Web-based argument mapping can overcome limits of space, time, and access, and it can empower users from all over the world to clarify their reasoning and to participate in deliberation and debate. Collaborative and web-based argument mapping tools such as AGORA-net can change the practice of arguing in two dimensions. First, arguing on web-based argument maps in both collaborative and adversarial form can lead to a fundamental shift in the way arguments are produced and debated. It can provide an alternative to the traditional four-step process of writing, publishing, debating, and responding in new writing with its clear distinction between individual and social activities by a process in which these four steps happen virtually simultaneously, and individual and social activities become more closely intertwined. Second, by replacing the linear form of arguments through graphical representations of networks of inferential relations which can grow over time in an infinite space, these tools do not only allow a clear visualization of structures and relations, but also forms of collaboration in which, for example, participants work on different “construction zones” of larger argument maps, or debates are performed at specific points of disagreement on those maps. I introduce the term synergetic logosymphysis to describe a practice that combines these two dimensions of collaborative- and web-based argument mapping. (shrink)

In ‘Kant's Refutation of Idealism’ (Noûs, 47), I defend a version of the Refutation, pioneered by Paul Guyer inKant and the Claims of Knowledge, whose core idea is that the only way that one can know the order of one's own past experiences, except in certain rare cases, is by correlating them with the successive states of perceived external objects that caused the experiences. Andrew Chignell has offered a probing critique of my reconstruction of Kant's argument (Philosophical Quarterly, 60), and (...) I have responded (Philosophical Quarterly, 61). In a rebuttal of my response, Chignell raises three new objections (Philosophical Quarterly, 61). My purpose in this paper is to reply to these. (shrink)

Kant was never satisfied with the version of his “Refu- tation” published in 1787 (KrV, B 275-279). His dissatisfaction is already evident in the footnote added to the preface of the second edition of the Critique in 1787. As a matter of fact, Kant continued to rework his argument for at least six years after 1787. The main exegetical problem is to figure out who is the target of the “Refutation”: a non-skeptic idealist, a global skeptic of Cartesian provenance or (...) both. In this last case, the related problem is to know whether either of them is the Cartesian skeptic of the first Meditation, the idealist skeptic of the second Meditation and first part of the third Meditation, or some other non-skeptic idealist. I present and defend a new reconstruction of Kant’s “Refu- tation” as a successful argument against Mendelssohnian idealism of Cartesian provenance. This defense is based on a simple logical sketch of the proof provided by Dicker but essentially modified in light of Dyck’s insight about Kant’s opponent. How shall I support my reading? First, by appealing to overwhelming textual evidence according to which the proof is of the existence of mind-independent things, showing that Kant’s main opponent is Mendelssohn’s idealism of Cartesian provenance. Finally, I support my reading by showing that Kant’s “Refutation” is doomed to fail against all forms of global skepticism but is quite successful against Mendelssohn’s idealism. (shrink)

Recent developments of transcendental arguments reflect the struggle to accommodate Stroud’s devastating objection by giving up on failed expectations in providing proof of what the external-world skeptic calls into question: knowledge of the existence of the outside world. Since Strawson's capitulation in 1984, the truth-direct transcendental arguments have given way to modest belief-direct transcendental arguments that concede that truth-direct transcendental arguments are doomed to fail to establish ambitious conclusions about reality but at the same time hold that they can nonetheless (...) successfully establish modest conceptual connection between the major beliefs within our conceptual scheme. This article seeks the “reactionary” rehabilitation of the old hubris: a new defense of the truth-direct transcendental argument. I set forth a new reconstruction of Kant’s Refutation as a successful truth-directed transcendental argument that meets Stroud’s objection. As with several papers and books about the theme, this article is of a systematic and a historical nature by connecting the contemporary debate about transcendental argument with Kant’s philosophy. (shrink)

According to Kant, there is some doctrine, which he sometimes calls 'empirical realism,' such that it was doubted by Descartes, denied by Berkeley, and endorsed by Kant himself. It may be doubted whether there really is such a doctrine or, if there is, whether it takes the form Kant seems to say it does. For instance, if empirical realism is taken as the assertion that familiar objects like tables and chairs exist, then this doctrine was neither seriously doubted by Descartes, (...) nor denied by Berkeley. If empirical realism is the view that such objects are mind-independent, then it was clearly denied by Berkeley, but was neither seriously doubted by Descartes, nor straightforwardly endorsed by Kant. Kant's assertion thus presents us with a puzzle: what might empirical realism be? The primary aim of this paper will be to reconstruct Kant's own narrative of the historical relationship between Descartes, Berkeley, and himself, in order to identify the doctrine Kant calls 'empirical realism.' I argue that the empirical realism which Descartes doubted, Berkeley denied, and Kant endorsed is the doctrine that the concept of extended substance has legitimate application. (shrink)

In the first experiment, I exhibit unreliable judgment about the primeness or divisibility of four-digit numbers, in contrast to a seeming Excel program. In the second experiment, I exhibit an imperfect memory for arbitrary-seeming three-digit number and letter combinations, in contrast to my seeming collaborator with seemingly hidden notes. In the third experiment, I seem to suffer repeated defeats at chess. In all three experiments, the most straightforward interpretation of the experiential evidence is that something exists in the universe that (...) is superior in the relevant respects – theoretical reasoning (about primes), memorial retention (for digits and letters), or practical reasoning (at chess) – to my own solipsistically-conceived self. (shrink)

This paper shows why Kant's critique of empirical psychology should not be read as a scathing criticism of quantitative scientific psychology, but has valuable lessons to teach in support of it. By analysing Kant's alleged objections in the light of his critical theory of cognition, it provides a fresh look at the problem of quantifying first-person experiences, such as emotions and sense-perceptions. An in-depth discussion of applying the mathematical principles, which are defined in the Critique of Pure Reason as the (...) constitutive conditions for mathematical-numerical experience in general, to inner sense will demonstrate why it is in principle possible to justify a quantitative structure of psychological judgments on the grounds of Kant's critical thinking. In conclusion, it will propose how Kant's critique could be used in a constructive way to develop first steps towards a transcendental foundation of psychological knowledge. (shrink)

The paper argues that in the Critique of Pure Reason Kant develops two anti-sceptical strategies. In the Fourth Paralogism (CPR A) he believes himself able to refute the sceptic by demonstrating that external perception is immediate. This strategy is rather unconvincing. In the Refutation of Idealism (CPR B) Kant promotes the material dependence of inner sense on outer sense. I show that Kant’s argument for material dependence has been widely overlooked, even though it is the strongest argument against external world (...) scepticism he develops, since it anticipates mental content externalism while preserving transcendental idealism and empirical realism. (shrink)