I believe that in about fifty years’time it will be possible,toprogramme computers, with a storage capacity of about 10～9,to makethem play the imitation game so well that an average interrogator willnot have more than 70 per cent chance of making the right identifica-tion after five minutes of questioning.The original question,"Can ma-chines think?"I believe to be too meaningless to deserve discussion."—Alan M.Turing.1950 "Computing machinery and intelligence"Mind,Vol.LLX.433-460——图灵在他的论文《计算机与智能》中的精彩论述。