Block makes a case for the existence of conscious experience without access. His case would have been much stronger, however, if he had woven fully unconscious processing into the and considered arguments that are intrinsic to neuroscience.

In O'Regan & Noë's (O&N's) account for the phenomenal experience of seeing, awareness is equated to what is within the current focus of attention. They find no place for a distinction between phenomenal and access awareness. In doing so, they essentially present a dualistic solution to the mind-brain problem, and ignore that we do have phenomenal experience of what is outside the focus of attention.

Recent developments in psychology and neuroscience suggest away to link the mental phenomenon of visual awareness with specific neural processes. Here, it is argued that the feed-forward activation of cells in any area of the brain is not sufficient to generate awareness, but that recurrent processing, mediated by horizontal and feedback connections is necessary. In linking awareness with its neural mechanisms it is furthermore important to dissociate phenomenal awareness from visual attention or decision processes.

Cowan makes an intriguing case for a fundamental limit in the number of chunks that can be stored in short term memory. Chunks are collections of concepts that have strong associations to one another and much weaker associations to other chunks. A translation of this definition for the visual domain would be that a visual chunk is a collection of features that belong to the same perceptual group. Here, we will first address the neuronal mechanisms that may demarcate visual chunks. (...) Then we critically evaluate to what extent these mechanisms might be responsible for the limit on the number of chunks that can be held in STM. We conclude that the clarity with which the psychophysical data point to the number four is not matched by a similarly clear limit imposed by physiological mechanisms. (shrink)

This editorial introduces the Journal of Consciousness Studies special issue on "Animal Consciousness". The 15 contributors and co-editors answer the question "How should we study animal consciousness scientifically?" in 500 words or fewer.

Anti-abortion proponents argue that a fetus holds the status of a person akin to healthy adult human beings. The fetus possesses inherent dignity and a fundamental right to life, which must be resp...

Society Semantics, introduced by W. Carnielli and M. Lima-Marques, is a method for obtaining new logics from the combination of agents of a given logic. The goal of this paper is to present several generalizations of this method, as well as to show some applications to many-valued logics. After a reformulation of Society Semantics in a wider setting, we develop in detail two examples of application of the new formalism, characterizing a hierarchy of paraconsistent logics called Pn and a hierarchy (...) of paracomplete logics In. We also propose three further generalizations, obtaining Society Semantics for several many-valued logics, including a hierarchy of logics called In Pk which are both paraconsistent and paracomplete. (shrink)

Problem 2 at the 56th International Mathematical Olympiad asks for all triples of positive integers for which ab−c, bc−a, and ca−b are all powers of 2. We show that this problem requires only a primitive form of arithmetic, going back to the Pythagoreans, which is the arithmetic of the even and the odd.

Coherence is a measure of how much our beliefs hang together. Understanding is achieved when we see that something is not just a brute, isolated fact. This suggests that it might be possible to use the extant probabilistic measures of coherence to formulate a measure of understanding. We attempt to do so, but it turns out that a coherence theory runs into trouble with the asymmetry of understanding. We identify four difficulties and show how they have been solved by a (...) unification approach to explanation. We also identify four advantages of the coherence approach, and assess the possibilities of reconciling the strengths of the two approaches.La coherencia es una medida sobre cuanta interdependencia hay entre nuestras creencias. La comprension se obtiene cuando vemos que algo no es un hecho bruto, aislado. Esto sugiere la posibilidad de usar las medidas probabilisticas de coherencia al uso para elaborar una medida de la comprension. Explorare esta posibilidad, a pesar de que una teoria de la coherencia tropieza con problemas aqui dado el caracter asimetrico de la comprension. Identifico cuatro dificultades al respecto y muestro como han sido resueltas mediante un enfoque de la explicacion basado en la nocion de unificacion. Tambien identifico cuatro ventajas en la aproximacion desde la coherencia y examino que perspectivas hay de reconciliar los puntos fuertes de ambos planteamientos. (shrink)

A finales del año pasado se publicaba el Informe sobre juventud en España que periódicamente elabora el INJUVE (Instituto de la Juventud de España). Unas investigaciones sobre la cuestión que, junto a las elaboradas por la Fundación Santa María, son unas de las máximas referencias a la hora de observar las evoluciones que se producen entre los jóvenes españoles.

Se hace una apretada síntesis de lo que significa la crisis de la civilización industrial o moderna, a partir de una mirada histórica que contempla el paisaje completo del pasado humano y de la vida. Se plantea que el dilema central es entre tradición y modernidad, y que para remontar la crisis se requiere remontar el dominio del racionalismo, la dependencia de la energía fósil, el abandono al que se ha condenado al individuo y la fase corporativa del capitalismo. Se (...) identifica la construcción del poder social como la piedra axial de una ecología política verdaderamente emancipadora. Se concluye que las próximas décadas serán cruciales pues se habrá de vivir el conflicto supremo entre el mono demente y el mono pensante, entre los intereses particulares y perversos y la conciencia cósmica. De ello dependerá la supervivencia de la especie humana o su desaparición. (shrink)

We establish some results on the Borel and difference hierarchies in φ-spaces. Such spaces are the topological counterpart of the algebraic directed-complete partial orderings. E.g., we prove analogs of the Hausdorff Theorem relating the difference and Borel hierarchies and of the Lavrentyev Theorem on the non-collapse of the difference hierarchy. Some of our results generalize results of A. Tang for the space Pω. We also sketch some older applications of these hierarchies and present a new application to the question of (...) characterizing the ω-ary Boolean operations generating a given level of the Wadge hierarchy from the open sets. (shrink)

In this lucid and insightful study, Stephen Makin investigates a form of argument widespread in ancient Greek philosophy, where the absence of a reason for one alternative to be the case rather than another is used to establish substantive conclusions—where the alternatives are “indifferent”. Examples abound: Anaximander engages in such reasoning to show that the Earth does not move; Zeno of Elea to show that what is cannot be divided; Democritus to argue for finite divisibility, on the one hand, and (...) the infinite variety of atoms and worlds, on the other; not to mention the extensive use of such arguments in ancient skepticism. (shrink)

ABBREVIATIONS Note. If the bibliography contains only one work by a certain author, and if a certain work in the bibliography is marked with an asterisk, ...

Les conditions de possession permettant l’individuation des concepts, bien que peu étudiées, constituent l’un des lieux fondamentaux de la polémique opposant les points de vue frégéen et anti-individualiste. Dans cet article, je décris une théorie compatibiliste de la valeur cognitive qui réunit des conditions de possession anti-individualistes et individualistes. Je soutiens que cette approche générale de la compatibilité des explications frégéenne et anti-individualiste de la possession de concepts suffit à mettre en doute l’idée voulant que la déférence et la transparence (...) sont des caractéristiques fondamentales de la valeur cognitive. (shrink)