How Human Can They Get?

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Science  30 Apr 1999:
Vol. 284, Issue 5415, pp. 745
DOI: 10.1126/science.284.5415.745

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The Age of Spiritual Machines When Computers Exceed Human Intelligence. Ray Kurzweil. Viking, New York, 1999. 400 pp. $25.95. ISBN 0-670-88217-8.

Kurzweil predicts that the next century will witness the fusion of humans and machines, but the reviewer finds such predictions for the future undercut by shortcomings in the book's account of the present and recent past.