The Ultimate Turing Test

What is the ultimate Turing Test? In 1950 Alan Turing published his now famous paper "Computing Machinery and Intelligence." In that paper he describes a method for humans to test AI programs. In its most basic form, a human judge sits at a computer terminal and interacts with the subject by written communication only. The judge must then decide if the subject on the other end of the computer link is a human or an AI program imitating a human.