The number of discriminable colours is often assumed to be of the order of several million but the extent of detectable chromatic diversity present in individual natural scenes is an open question. Here, the aim was to estimate the number of discriminable colours seen in natural scenes. Hyperspectral data were obtained from a set of natural scenes over the range 400 - 720 nm at 10 nm intervals (Nascimento et al, 2002 Journal of the Optical Society of America A 19 (...) 1484 - 1490) and the representation of each scene in CIELAB space computed for all pixels of the image. The number of discriminable colours was estimated by counting the number of unit volumes in the three-dimensional volume defined by the scene when represented in CIELAB space. We found that the number of discriminable colours estimated in a scene could vary by an order of magnitude from scene to scene, but rarely exceeded 105, indicating a limited chromatic diversity. (shrink)

The theory of emotion developed by William James has been subject to four criticisms. First, it is held that Jamesian emotion is without function, that it plays no role in cognition and behavior. Second, that James ignores the role of experience in emotion. Third, that James overstated the role of physical processes in emotion. Fourth, that James’ theory of emotion has been experimentally demonstrated to be false. A fifth point, less an explicit criticism than an assumption, holds that James has (...) nothing to offer a social psychology of emotions. It will be shown in this paper that not one of these criticisms of James' theory of emotion can be sustianed. (shrink)

In the Preface to Negative Dialectics, Adorno states that the primary ambition of the book is to find a substitute for the “supra‐ordinated” concept and to “break through the deception of constitutive subjectivity.” For a book whose ambition is to renew the Marxist idea of critique, these are puzzling claims. The notions to be criticized are Kant's in The Critique of Pure Reason ; Adorno, from his earliest studies with Siegfried Kracauer, had taken Kant's theoretical philosophy as expressing the deepest (...) conceptual and normative commitments of capital. This chapter attempts to specify what the expressive relation between idealist conceptuality and capital is; why Adorno took the transcendental unity of apperception to express a society that was unconscious about itself; and precisely how negative dialectics is throughout key to a critique of Kant's philosophy. (shrink)

Cosmological boundary conditions for particles and fields are often discussed as a Cauchy problem, in which configurations and conjugate momenta are specified on an “initial” time slice. But this is not the only way to specify boundary conditions, and indeed in action-principle formulations we often specify configurations at two times and consider trajectories joining them. Here, we consider a classical system of particles interacting with short range two body interactions, with boundary conditions on the particles’ positions for an initial and (...) a final time. For a large number of particles that are randomly arranged into a dilute gas, we find that a typical system trajectory will spontaneously collapse into a small region of space, close to the maximum density that is obtainable, before expanding out again. If generalizeable, this has important implications for the cosmological arrow of time, potentially allowing a scenario in which both boundary conditions are generic and also a low-entropy state “initial” state of the universe naturally occurs. (shrink)

It is shown that Russell's Paradox can be solved without advocating the Theory of Types, and also that the Liar's Paradox can be solved in much the same way. Neither solution requires that any of our commonsense-based beliefs be revised, let alone jettisoned. It is also shown that the Theory of Types is false.

The Collected Works of John Stuart Mill took thirty years to complete and is acknowledged as the definitive edition of J.S. Mill and as one of the finest works editions ever completed. Mill's contributions to philosophy, economics, and history, and in the roles of scholar, politician and journalist can hardly be overstated and this edition remains the only reliable version of the full range of Mill's writings. Each volume contains extensive notes, a new introduction and an index. Many of the (...) volumes have been unavailable for some time, but the Works are now again available, both as a complete set and as individual volumes. (shrink)

This book is a collection of papers on the metaphysics and natural philosophy of John Buridan (ca. 1295-1361), one of the most innovative and influential ...

Aristotle and the sea battle, by G. E. M. Anscombe.--Aristotle's different possibilities, by K. J. J. Hintikka.--On Aristotle's square of opposition, by M. Thompson.--Categories in Aristotle and in Kant, by J. C. Wilson.--Aristotle's Categories, chapters I-V: translation and notes, by J. L. Ackrill--Aristotle's theory of categories, by J. M. E. Moravcsik.--Essence and accident, by I. M. Copi.--Tithenai ta phainomena, by G. E. L. Owen.--Matter and predication in Aristotle, by J. Owens.--Problems in Metaphysics Z, chapter 13, by M. J. Woods.--The meaning (...) of agathon in the Ethics of Aristotle, by H. A. Prichard.--Agathon and eudaimonia in the Ethics of Aristotle, by J. L. Austin.--The final good in Aristotle's Ethics, by W. F. R. Hardie.--Aristotle on pleasure, by J. O. Urmson.--Bibliography (p. 335-41). (shrink)