 Dreyfus 2011 |
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| Born | October 15, 1929 |
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| Era | 20th/21st century philosophy |
| Region | Western Philosophy |
| School | Phenomenology |
| Main interests | Phenomenology, existentialism, psychology of literature and psychology |
| Notable ideas | Dreyfus' critique of artificial intelligence |
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Hubert Lederer Dreyfus (born October 15, 1929) is an American philosopher. He is a professor of philosophy at the University of California, Berkeley.
His main interests include phenomenology, existentialism and the philosophy of both psychology and literature, as well as the philosophical implications of artificial intelligence. Dreyfus is known for his exegesis of Martin Heidegger, which critics labeled "Dreydegger". A number of his students have gone on to hold tenured positions in leading American philosophy departments while working on themes related to Heidegger and phenomenology, including William Blattner[3], Taylor Carman, John Haugeland, Sean Dorrance Kelly[4], John Richardson (philosopher)[5], Charles Siewert[6], and Mark Wrathall.
Born in Terre Haute, Indiana to Stanley S. and Irene Lederer Dreyfus, Dreyfus was educated at Harvard University, earning three degrees there, with a BA in 1951, an MA in 1952, and a PhD in 1964, under the supervision of Dagfinn Føllesdal. He is considered a leading interpreter of the work of Edmund Husserl, Michel Foucault, and Maurice Merleau-Ponty, but especially of Martin Heidegger. His Being-in-the-World: A Commentary on Heidegger's "Being and Time," Division 1, is thought by many who have attempted to teach Heidegger to undergraduates to be the authoritative text on Heidegger's most significant contribution to philosophy. He also co-authored Michel Foucault: Beyond Structuralism and Hermeneutics, translated Merleau-Ponty's Sense and Non-Sense, and authored the controversial 1972 book What Computers Can't Do, revised first in 1979, and then again in 1992 with a new introduction as What Computers Still Can't Do. While spending most of his teaching career at Berkeley, Professor Dreyfus has also taught at Brandeis University (1957 to 1959), the Massachusetts Institute of Technology (from 1960 to 1968), the University of Frankfurt, and Hamilton College. His philosophical work has influenced Richard Rorty, Charles Taylor, John Searle, and his former student John Haugeland, among others. His critical comments on the existential phenomenology and subsequent dialectical philosophy of Jean-Paul Sartre may well have played a significant role in the demise of Sartre's influence on recent thought.
In 1965, while teaching at Massachusetts Institute of Technology, Dreyfus published "Alchemy and Artificial Intelligence", an attack on the work of Allen Newell and Herbert A. Simon, two of the leading researchers in the field of Artificial Intelligence. Dreyfus not only questioned the results they had so far obtained, but he also criticized their basic presupposition (that intelligence consists of the manipulation of physical symbols according to formal rules), and argued that the AI research program was doomed to failure. In 1965, he spent time at the Rand Corporation, while work on artificial intelligence was in progress there.
In addition to criticizing artificial intelligence, Dreyfus is well known for making the work of continental philosophers, especially Martin Heidegger, Maurice Merleau-Ponty, and Michel Foucault, intelligible to analytically trained philosophers.
His younger brother, Stuart Dreyfus, earned a Ph.D. in applied mathematics and is a professor of industrial engineering and operations research at the University of California, Berkeley.
Dreyfus's critique of artificial intelligence (AI) concerns what he considers to be the four primary assumptions of AI research. The first two assumptions are what he calls the "biological" and "psychological" assumptions. The biological assumption is that the brain is analogous to computer hardware and the mind is analogous to computer software. The psychological assumption is that the mind works by performing discrete computations (in the form of algorithmic rules) on discrete representations or symbols.
Dreyfus claims that the plausibility of the psychological assumption rests on two others: the epistemological and ontological assumptions. The epistemological assumption is that all activity (either by animate or inanimate objects) can be formalised (mathematically) in the form of predictive rules or laws. The ontological assumption is that reality consists entirely of a set of mutually independent, atomic (indivisible) facts. It's because of the epistemological assumption that workers in the field argue that intelligence is the same as formal rule-following, and it's because of the ontological one that they argue that human knowledge consists entirely of internal representations of reality.
On the basis of these two assumptions, workers in the field claim that cognition is the manipulation of internal symbols by internal rules, and that, therefore, human behaviour is, to a large extent, context free (see contextualism). Therefore a truly scientific psychology is possible, which will detail the 'internal' rules of the human mind, in the same way the laws of physics detail the 'external' laws of the physical world.
But it is this key assumption that Dreyfus denies. In other words, he argues that we cannot now (and never will) be able to understand our own behavior in the same way as we understand objects in, for example, physics or chemistry: that is, by considering ourselves as things whose behaviour can be predicted via 'objective', context free scientific laws. According to Dreyfus, a context free psychology is a contradiction in terms.
Dreyfus's arguments against this position are taken from the phenomenological and hermeneutical tradition (especially the work of Martin Heidegger). Heidegger argued that, contrary to the cognitivist views on which AI is based, our being is in fact highly context bound, which is why the two context-free assumptions are false. Dreyfus doesn't deny that we can choose to see human (or any) activity as being 'law governed', in the same way that we can choose to see reality as consisting of indivisible atomic facts ... if we wish. But it is a huge leap from that to state that because we want to or can see things in this way that it is therefore an objective fact that they are the case. In fact, Dreyfus argues that they are not (necessarily) the case, and that, therefore, any research program that assumes they are will quickly run into profound theoretical and practical problems. Therefore the current efforts of workers in the field are doomed to failure.
Although Dreyfus has a reputation as a Luddite in some quarters, he doesn't believe that AI is fundamentally impossible, but rather that the current research program is fatally flawed. He argues that to get a device or devices with human-like intelligence would require them to have a human-like being-in-the-world and to have bodies more or less like ours, and social acculturation (i.e. a society) more or less like ours. (This view is shared by psychologists in the embodied psychology (Lakoff and Johnson 1999) and distributed cognition traditions. His opinions are similar to those of robotics researchers such as Rodney Brooks as well as researchers in the field of artificial life.)
Daniel Crevier writes: "time has proven the accuracy and perceptiveness of some of Dreyfus's comments. Had he formulated them less aggressively, constructive actions they suggested might have been taken much earlier."
When UC Berkeley and Apple began making a selected number of lecture classes freely available to the public as podcasts beginning around 2006, a recording of Dreyfus teaching a course called "Man, God, and Society in Western Literature - From Gods to God and Back" rose to 58th most popular webcast on iTunes.[7] These webcasts have attracted the attention of many, including non-academics, to Dreyfus and his subject area.
Dreyfus was elected a Fellow of the American Academy of Arts and Sciences in 2001. Erasmus University awarded Dreyfus an honorary doctorate "for his brilliant and highly influential work in the field of artificial intelligence, and for his equally outstanding contributions to the analysis and interpretation of twentieth century continental philosophy".
Dreyfus is featured in Tao Ruspoli's film Being in the World.
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