The paper addresses the issue of human diagrammatic reasoning in the context of Euclidean geometry. It develops several philosophical categories which are useful for a description and an analysis of our experience while reasoning with diagrams. In particular, it draws the attention to the role of seeing-as; it analyzes its implications for proofs in Euclidean geometry and ventures the hypothesis that geometrical judgments are analytic and a priori, after all.

A central objection to McDowell’s conceptualism about empirical content concerns the fine-grained phenomenology of experience, which supposedly entails that the actual content of experience cannot be matched in its particularity by our concepts. While McDowell himself has answered this objection in recourse to the possibility of demonstrative concepts, his reply has engendered a plethora of further objections and is widely considered inadequate. I believe that McDowell’s critics underestimate the true force of his reply because they tend to read unrecognized empiricist (...) presuppositions into his account of experience. To show this, I introduce a new hylomorphic reading of McDowell’s account of experience and argue that the objections to his reply all rest on a specific empiricist assumption, which is untenable because it conflates the form of experience with its content. Consequently, conceptualism so understood can resist all of these objections, as I attempt to show by systematizing and answering them. (shrink)

Arguments for attributing non-conceptual content to experience have predominantly been motivated by aspects of the visual perception of empirical properties. In this article, I pursue a different strategy, arguing that a specific class of affective-evaluative experiences have non-conceptual content. The examples drawn on are affective-evaluative experiences of first exposure, in which the subject has a felt valenced intentional attitude towards evaluative properties of the object of their experience, but lacks any powers of conceptual discrimination regarding those evaluative properties. I also (...) show that by accepting this thesis we can explain relevant features of evaluative understanding. (shrink)

Arguments for attributing non-conceptual content to experience have predominantly been motivated by aspects of the visual perception of empirical properties. In this article, I pursue a different strategy, arguing that a specific class of affective-evaluative experiences have non-conceptual content. The examples drawn on are affective-evaluative experiences of first exposure, in which the subject has a felt valenced intentional attitude towards evaluative properties of the object of their experience, but lacks any powers of conceptual discrimination regarding those evaluative properties. I also (...) show that by accepting this thesis we can explain relevant features of evaluative understanding. (shrink)

This paper deals with the question whether, and to what extent, perceptions can provide a justification for our empirical beliefs. In particular, it addresses the issue of whether they need to be conceptualized by a subject in order to play a justificatory role. It is argued that the conditions under which a subject can have perceptual representational contents and those under which those representational contents can play a justificatory role differ. The upshot is that perception can provide justification only for (...) the beliefs of those creatures who have a conceptual apparatus and are therefore in a position passively to exercise it in perception, even though also creatures devoid of concepts can and often do have perceptual representations. (shrink)

Conceptualist accounts of the representational content of perceptual experiences have it that a subject _S_ can experience no object, property, relation, etc., unless _S_ "i# possesses and "ii# exercises concepts for such object, property, or relation. Perceptual experiences, on such a view, represent the world in a way that is conceptual.

I argue that the debate about the reason-giving character of perception, and, derivatively, the contemporary debate about the nature of the conceptual content of perception, is best viewed as a confrontation with refined versions of the following three independently plausible, yet mutually inconsistent, propositions: Perceptual apprehension Some perceptions provide reasons directly Exclusivity Only beliefs provide reasons directly Bifurcation No perception is a belief I begin with an evaluation and refinement of each proposition so as to crystallize the source of the (...) difficulties that dominate our thinking about the reason-giving character of perception. I argue that the contemporary literature is broadly split between those denying Bifurcation and those denying Perceptual apprehension. Though Exclusivity, too, has been target to criticism, its grip on our thinking has all too often been underestimated. As a result, a proper denial or modification of Exclusivity is yet wanting. Overcoming Exclusivity involves a considerable challenge that has not been adequately acknowledged or met—to develop a substantive account of nonconceptual apprehension. Getting a clearer understanding of the nature, the source, and possible resolution of this challenge is the primary aim of this paper. (shrink)

Extended Rationality: A Hinge Epistemology provides a novel account of the structure of epistemic justification. Its central claim builds upon Wittgenstein's idea in On Certainty that epistemic justifications hinge on some basic assumptions and that epistemic rationality extends to these very hinges. It exploits these ideas to address major problems in epistemology, such as the nature of perceptual justifications, external world skepticism, epistemic relativism, the epistemic status of basic logical laws, of the Principle of the Uniformity of Nature, of our (...) belief in the existence of the past and of other minds, and the nature of testimonial justification. Along the way, further technical issues, such as the scope of the Principle of Closure of epistemic operators under known entailment, the notion of transmission failure, and the existence of entitlements are addressed in new and illuminating ways. (shrink)