The Imitation Game (2014)
In the original illustrative example, a human judge engages in natural language conversations with a human and a machine designed to generate performance indistinguishable from that of a human being. The conversation is limited to a text-only channel such as a computer keyboard and screen so that the result is not dependent on the machine's ability to render words into audio. All participants are separated from one another. If the judge cannot reliably tell the machine from the human, the machine is said to have passed the test. The test does not check the ability to give the correct answer to questions; it checks how closely each answer resembles the answer a human would give.
The test was introduced by Alan Turing in his 1950 paper "Computing Machinery and Intelligence," which he asks, "Are there imaginable digital computers which would do well in the imitation game?" This question, Turing believed, is one that can actually be answered.
More than 50 years later, no computer could pass the test.