Shadows of the Mind: A Search for the Missing Science of Consciousness

Paperback | August 15, 1996

byRoger Penrose

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A New York Times bestseller when it appeared in 1989, Roger Penrose's The Emperor's New Mind was universally hailed as a marvelous survey of modern physics as well as a brilliant reflection on the human mind, offering a new perspective on the scientific landscape and a visionary glimpse of thepossible future of science. Now, in Shadows of the Mind, Penrose offers another exhilarating look at modern science as he mounts an even more powerful attack on artificial intelligence. But perhaps more important, in this volume he points the way to a new science, one that may eventually explain thephysical basis of the human mind. Penrose contends that some aspects of the human mind lie beyond computation. This is not a religious argument (that the mind is something other than physical) nor is it based on the brain's vast complexity (the weather is immensely complex, says Penrose, but it is still a computable thing, atleast in theory). Instead, he provides powerful arguments to support his conclusion that there is something in the conscious activity of the brain that transcends computation--and will find no explanation in terms of present-day science. To illuminate what he believes this "something" might be, andto suggest where a new physics must proceed so that we may understand it, Penrose cuts a wide swathe through modern science, providing penetrating looks at everything from Turing machines (computers programmed from artificial intelligence) to the implications of Godel's theorem maintaining thatconscious thinking must indeed involve ingredients that cannot adequately be stimulated by mere computation. Of particular interest is Penrose's extensive examination of quantum mechanics, which introduces some new ideas that differ markedly from those advanced in The Emperor's New Mind, especiallyconcerning the mysterious interface where classical and quantum physics meet. But perhaps the most interesting wrinkle in Shadows of the Mind is Penrose's excursion into microbiology, where he examines cytoskeletons and microtubules, minute substructures lying deep within the brain's neurons. (Heargues that microtubules--not neurons--may indeed be the basic units of the brain, which, if nothing else, would dramatically increase the brain's computational power.) Furthermore, he contends that in consciousness some kind of global quantum state must take place across large areas of the brain,and that it within microtubules that these collective quantum effects are most likely to reside. For physics to accommodate something that is as foreign to our current physical picture as is the phenomenon of consciousness, we must expect a profound change--one that alters the very underpinnings of our philosophical viewpoint as to the nature of reality. Shadows of the Mind provides anilluminating look at where these profound changes may take place and what our future understanding of the world may be.

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From Our Editors

The bestselling author of The Emperor's New Mind offers another exhilarating look at modern science as he mounts an even more powerful attack on artifical intelligence. Shadows of the Mind points the way to a new science, one that may eventually explain the physical basis of the human mind. 49 illustrations

From the Publisher

A New York Times bestseller when it appeared in 1989, Roger Penrose's The Emperor's New Mind was universally hailed as a marvelous survey of modern physics as well as a brilliant reflection on the human mind, offering a new perspective on the scientific landscape and a visionary glimpse of thepossible future of science. Now, in Shadows...

Roger Penrose is the Rouse Ball Professor of Mathematic at the University of Oxford. He is the author of The Emperor's New Mind, which was a New York Times bestseller and was awarded the UK's 1990 COPUS Prize for science writing. In 1988, he received the internationally prestigious Wolf Prize for physics, shared with Stephen Hawking, ...
Format:PaperbackDimensions:480 pages, 6.06 × 9.25 × 0.94 inPublished:August 15, 1996Publisher:Oxford University Press

The following ISBNs are associated with this title:

ISBN - 10:0195106466

ISBN - 13:9780195106466

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From Our Editors

The bestselling author of The Emperor's New Mind offers another exhilarating look at modern science as he mounts an even more powerful attack on artifical intelligence. Shadows of the Mind points the way to a new science, one that may eventually explain the physical basis of the human mind. 49 illustrations

Editorial Reviews

"There is never any fudging or wide-eyed metaphor-mongering in Penrose: he knows his stuff inside out and he does his level best to communicate it to the lay reader....It is a deeply serious and honest attempt to understand one of the hardest things there is to understand. The science isbeautifully presented...clearly the product of a brilliant mind."--Times Literary Supplement