In A Priori Justification, Albert Casullo argues that extant attempts to explicate experiential justification—by stipulation, introspection, conceptual analysis, thought experimentation, and/or appeal to intuitions about hypothetical cases—are unsuccessful. He draws the following conclusion: “armchair methods” such as these are inadequate to the task. Instead, empirical methods should be used to investigate the distinction between experiential and non-experiential justification and to address questions concerning the nature, extent, and existence of the a priori. In this essay, I show that Casullo has not (...) refuted armchair explications of experiential justification, in particular those that appeal to introspectively accessible phenomenology. I do this by presenting a phenomenal theory of experiential justification that (a) has a significant degree of initial plausibility and (b) survives Casullo’s general attack on such theories. As a result, a premise in the central argument for Casullo’s signature proposal concerning the a priori is undermined. (shrink)

This paper discusses knowledge of opposites. In particular, attention is given to the linguistic notion of antonymy and how it represents oppositional relations that are commonly found in perception. The paper draws upon the long history of work on the formalisation of antonymy in linguistics and formal semantics, and also upon work on the perception of opposites in psychology, and an assessment is made of the main approaches. Treatments of these phenomena in linguistics and psychology posit that the principles of (...) minimal difference and invariance are centrally important. It will be suggested that the standard approach employing meaning postulates fails to capture the relevant notion of antonymy, in part because it is not informed by these principles, and in part due to a number of other problems with this kind of approach, many of which may be overcome by building in the central principles from the beginning. The paper also discusses the issue of whether we can know that opposites necessarily exclude each other and, if so, how. This issue is intertwined with what is known as the colour incompatibility problem that Wittgenstein wrangled with at various times during his life. The paper assesses various solutions to these problems including an approach that was first put forward by Jerrold J. Katz. The relation between this approach and the theory of determinables and determinates is also examined. A further development upon this approach is proposed and then applied to the case of the formalisation of antonymy. It is argued that this approach avoids the problems suffered by the main approaches discussed earlier in the paper. (shrink)

This article considers an interpretative model for the study of Heraclitus, which was first put forward by Alexander Mourelatos in 1973, and draws upon a related model put forward by Julius Moravcsik beginning in 1983. I further develop this combined model and provide a motivation for an interpretation of Heraclitus. This is also of interest for modern metaphysics due to the recurrence of structurally similar problems, including the ‘colour exclusion’ problem that was faced by Wittgenstein. Further, I employ the model (...) to shed new light on Heraclitus’ image of the river, while relating potential readings to various contemporary metaphysical views. (shrink)

This paper argues that there are true synthetic modal claims and that modal questions in philosophy in general are to be interpreted not in terms of logical necessity but in terms of synthetic necessity. I begin by sketching the debate about modality between logical positivism and phenomenology. Logical empiricism taught us to equate being tautological with being necessary. The common view is that tautologies are necessary in the narrow sense but that there is also necessity in a wider sense. I (...) argue against this that we should distinguish necessity from analyticity and possibility from consistency. (shrink)

This article discusses how the words 'necessary' and 'analytic' are suitably used in philosophy. It is argued that analytic statements should not be called 'necessary'.