David R. Hilbert

Naturalistic theories of content and whether or not reason-giving explanations of human behavior are causal explanations have been central topics in recent philosophy of mind. Fred Dretske, in his book Explaining Behavior, attempts to construct a naturalistic theory of the contents of beliefs and desires that gives these mental states an important role in the causation of behavior. Even if Dretske is granted that the theory adequately accounts for individual behaviors the theory still faces problems in offering an adequate account of important features of extended sequences of behavior. Some sequences of behavior exhibit coherence in the sense that the elements of the sequence either contribute to the atttainment of a goal state or only make sense on the supposition that the goal state will be attained. Two ways of attaining coherence are distinguished. In chaining behavior coherence is guaranteed by the fit between the internal structure of the organism and the structure of the external environment. In other cases of coherence chaining is not available as an explanation. It is argued that Dretske.

In Colour for Architecture, published in 1976, the editors, Tom Porter and Byron Mikellides, explain that their book was “produced out of an awareness that colour, as a basic and vital force, is lacking from the built environment and that our knowledge of it is isolated and limited.”1 Lack of urban color was then especially salient in Britain—where the book was published—which had just begun to recoil at the Brutalist legacy of angular stained gray concrete strewn across the postwar landscape. Perhaps because the most urgent need was to inject some hue into this architectural dystopia, one of the main innovations illustrated in the book involves nothing more than cans of paint. Dull unfinished concrete façades, the interior of a subway station, a cement works, and so on, are shown enlivened by fields of bright color.

Anomaloscope An instrument used for detecting anomalies of color vision. The test subject adjusts the ratio of two monochromatic lights to form a match with a third monochromatic light. The most common form of this procedure involves a Rayleigh match: a match between a mixture of monochromatic green and red lights, and a monochromatic yellow light. Normal subjects will choose a matching ratio of red to green light that falls within a fairly narrow range of values. Subjects with anomalous color vision will choose a ratio of red to green that falls outside this range, and red-green dichromats will accept any ratio of red to green as forming a match

The 18th century philosopher and Anglican bishop, George Berkeley, is chiefly known to posterity for advocating the radical thesis that there is no unthinking stuff in the world. According to Berkeley, bar stools, kegs, mugs and the all paraphernalia of ordinary life (plus everything else) are merely ideas and have no existence outside the mind of those seated on the stools, tapping the kegs, and drinking from the mugs. What is less well-known is that Berkeley devoted much of his energy in later life to promoting the use of a concoction he called tar-water for the treatment of a wide variety of health ailments. Fortunately, Berkeley thought that many of the same virtues were found in some beers. It may seem paradoxical that one and the same man could both claim that beer only exists as an idea in the minds of those consuming it and that it could cure all known afflictions. Berkeley's resolution of this paradox will be explored and it will be seen that it is possible to both appreciate and benefit from beer even if it is only an idea.

What is color? Of course, examples of colorful objects are not hard to come by (Fig. 1 provides numerous examples), so the question itself is slightly puzzling, suggesting that some confusion needs to be cleared up or ignorance enlightened. But how could anyone (who isn’t blind or Fig. 1 Atoms Inside Balloons totally lacking in color vision) possibly be confused about what color is? After all, if we learn anything about the world merely by looking at it, it’s the colors of the things we see. How could we do this if we were confused about or ignorant of the nature of color? We might be confused..

One of the traditional problems of philosophy is the nature of the connection between perceptual experience and empirical knowledge. That there is an intimate connection between the two is rarely doubted. Three case studies of visual deficits due to brain damage are used to motivate the claim that perceptual experience is neither necessary nor sufficient for perceptual knowledge. Acceptance of this claim leaves a mystery as to the epistemic role, if any, of perceptual experience. It is argued that one function of perceptual experience is to provide information about the sources of beliefs, both as to which perceptual modality and within a given modality. This information is useful in assessing the reliability of perceptual beliefs.

Erster Teil Die übliche Auffassung von der Mathematik und ihre Widerlegung.- 1 Die Rolle von Anschauung und Erfahrung.- 2 Die Rolle der Voraussetzungen.- 3 Die Nichtuntrüglichkeit des mathematischen Schliessens.- Zweiter Teil Die landläufige Auffassung von der Physik und ihre Berichtigung.- 4 Physikalische Begriffsbildungen.- 5 Die Gesetze der Physik und ewige Naturgesetze.- 6 Die Beziehung zwischen Theorie und Experiment.- Dritter Teil Fragen philosophischen Charakters.- 7 Physikalische Gesetzlichkeit und Kausalität.- 8 Naturgeschehen und Wahrscheinlichkeit.- 9 Die Rolle von idealen Gebilden.

Deeply original, inspiring to some, abhorrent to others, George Berkeley’s philosophy of immaterialism is still influential three hundred years after the publication of his most widely read book, _Three Dialogues Between Hylas and Philonous. _Berkeley published the _Dialogues _because of the unenthusiastic reception of his _Principles of Human Knowledge _in 1710._ _He hoped the use of the_ _dialogue format would win a more favorable hearing, but unfortunately for Berkeley, the response was every bit as scathing as the reception of his previous work. In recent decades, Berkeley’s work has been recognized as an excellent introduction to the English philosophy of the eighteenth century, and to philosophy in general. This edition of the dialogues is accessibly organized by David Hilbert and John Perry.

Color has often been supposed to be a subjective property: a property which has its correct analysis in terms of phenomenological aspects of human experience. The most influential form of subjectivism with respect to color has been the dispositional analysis of Locke and Newton. On this view the color of an object is analyzed in terms of its disposition to produce certain kinds of experiences. ;In contrast with subjectivism an objectivist analysis of color takes color to be a property objects possess in themselves, independently of the character of human perceptual experience. I defend a form of objectivism that identifies color with a physical property of surfaces: their spectral reflectance. This particular form of objectivism with respect to color is shown to be superior to dispositional analyses in doing justice to both the facts of color perception and our common sense intuitions about color. ;Two important features of human color vision are shown to be better accounted for by this form of objectivism than by its rivals. First, the existence of color constancy points to the identification of color with a property of objects such as spectral reflectance rather than with any property of light. Second, the existence of variation in color perception among normal human observers is much more easily accounted for by a objectivist analysis than by a dispositional one. This sort of variation points to the existence of differences of color that are imperceivable by a normal observer in normal circumstances: a fact that conflicts with the main features of dispositional accounts. ;The realization that perception and language give us access to kinds of colors and not to individual determinate colors allows for an account of color perception and language that is consistent with the identification of color with surface spectral reflectance. Color perceptions and color terms convey information about anthropocentric yet objective kinds of reflectances. ;The identification of color with surface spectral reflectance can be defended against the main arguments in favor of subjectivism and preserves most of our pre-analytic beliefs about color.