Hubert Dreyfus

(1929 - 2017)

One's model of skill determines what one expects from neural network modelling and how one proposes to go about enhancing expertise. We view skill acquisition as a progression from acting on the basis of a rough theory of a domain in terms of facts and rules to being able to respond appropriately to the current situation on the basis of neuron connections changed by the results of responses to the relevant aspects of many past situations. Viewing skill acquisition in this ways suggests how one can avoid the problem currently facing AI of how to train a network to make human-like generalizations. In training a network one must progress, as the human learner does, from rules and facts to wholistic responses. As to future work, from our perspective one should not try to enhance expertise as in traditional AI by attempting to construct improved theories of a domain, but rather by improving the learner's access to the relevant aspects of a domain so as to facilitate learning from experience.

The Matrix raises several familiar philosophical problems in such new ways that students all over the country are assigning it to their philosophy professors. In so doing, they have offered us a great opportunity to illustrate some of the basic insights of existential phenomenology. The Matrix might seem to renew Descartes’s worry that, since all we ever experience are our own inner mental states, we might, for all we could tell, be living in an illusion created by a malicious demon. In that case, most of our beliefs about reality would be false. But there is a way of understanding The Matrix that denies the mediation of mental states and shows those living in the Matrix to be in direct touch with Matrix reality. The Matrix world is public and objective, not a private subjective dream. Still, there is clearly a sense in which the Matrix world, while not merely mental, is not real either. There is after all a demon—the AI intelligences and their computer—that has in some sense fooled all those who accept the reality of the Matrix world. Thus, the film’s account of our situation is even more disturbing than Descartes’s claim that we are each confined to our own mind. The Matrix world is a vivid illustration of Descartes’s additional prescient claim that we could never be in direct touch with the real world because we are all what we would now call brains in vats.

Ways of the Hand tells the story of how David Sudnow learned to improvise jazz on the piano. Because he had been trained as an ethnographer and social psychologist, Sudnow was attentive to what he experienced in ways that other novice pianists are not. The result, first published in 1978 and now considered by many to be a classic, was arguably the finest and most detailed account of skill development ever published.Looking back after more than twenty years, Sudnow was struck by the extent to which he had allowed his academic background to shape the book's language. He realized that he could now do a much better job of describing his experiences in a way that would not require facility with formal social science and philosophical discourse. The result is a revised version of the book that carries the same intellectual energy as the original but is accessible to a much wider audience

Husserl and Searle agree that, for a bodily movement to be an action, it must be caused by a propositional representation. Husserl's representation is a mental state whose intentional content is what the agent is trying to do; Searle thinks of the representation as a logical structure expressing the action's conditions of satisfaction. Merleau-Ponty criticises both views by introducing a kind of activity he calls motor intentionality, in which the agent, rather than aiming at success, feels drawn to reduce a felt tension. I argue that Searle can account for Merleau-Ponty's kind of coping only by broadening his notion of propositional representation to include indexicals, but that, in so doing, he covers up the way representational intentionality depends upon motor intentionality.

_A Companion to Phenomenology and Existentialism_ is a complete guide to two of the dominant movements of philosophy in the twentieth century. Written by a team of leading scholars, including Dagfinn Føllesdal, J. N. Mohanty, Robert Solomon, Jean-Luc Marion Highlights the area of overlap between the two movements Features longer essays discussing each of the main schools of thought, shorter essays introducing prominent themes, and problem-oriented chapters Organised topically, around concepts such as temporality, intentionality, death and nihilism Features essays on unusual subjects, such as medicine, the emotions, artificial intelligence, and environmental philosophy.

Actual AI research began auspiciously around 1955 with Allen Newell and Herbert Simon's work at the RAND Corporation. Newell and Simon proved that computers could do more than calculate. They demonstrated that computers were physical symbol systems whose symbols could be made to stand for anything, including features of the real world, and whose programs could be used as rules for relating these features. In this way computers could be used to simulate certain important aspects intelligence. Thus the information-processing model of the mind was born. But, looking back over these fifty years, it seems that theoretical AI with its promise of a robot like HAL appears to be a perfect example of what Imre Lakatos has called a "degenerating research program"