On Ray Kurzweil’s The Age of Spiritual Machines:
“I cannot recall reading a book in which there is such a huge gulf between the spectacular claims advanced and the weakness of the arguments given in their support.” — John Searle
In 1999, Mr. Searle wrote this review for the New York Review of Books. Much of it is hidden behind a pay-wall, but a pointed exchange about the review between Kurzweil and Searle is still available for free. The quote above comes from that exchange. In the time since his book and Searle’s subsequent review came out, Kurzweil may have improved his arguments, but probably not enough to overcome Searle’s objections.