Hofstadter said in GEB that "intelligence" is almost always defined implicitly as "whatever we currently think computers can't do," and that goalpost gets moved with astonishing regularity. The fact that a machine can do something means that it must not take intelligence, right? Thus, computers are able to do more and more that would have been thought impossible just 5 years ago, and we still convince ourselves that A.I. lies far beyond the horizon.