““Never’’ is a dangerous word. Deep Blue’s marvelous play in a stunning game two so unhinged the champion that he failed to win another round. On May 11 he literally threw his hands up, resigning the humiliating final game to lose the match 3 1/2-2 1/2, indicating that computers, at least in the realm of chessboards, are smarter than we are. (IBM, more corporation than sportsman, has refused a rematch.) Commentators rushed to assure flesh-and-bloodlings that machines will never outthink us in more complicated pursuits. But just ask Garry Kasparov about what ““never’’ means.