“Computing Machinery and Intelligence” was published by Alan Turing in 1950 in the philosophy journal Mind (volume LIX, issue 236, pages 433-460). It is one of the most influential papers in the history of computing and the founding document of artificial intelligence as a research question.
Turing opened by asking “Can machines think?” and then immediately set that question aside as too vague to answer. In its place he proposed what he called the imitation game: a human judge holds a text conversation with two unseen partners, one human and one machine, and tries to tell which is which. If the machine fools the judge as often as a human would, Turing argued, there is no good reason to deny that it is doing something we would call thinking. This is the test that now bears his name.
The paper was new because it shifted the debate from philosophy to engineering. Rather than arguing about consciousness or the soul, Turing gave a concrete, testable behavioral criterion. He also spent much of the paper rebutting objections to machine intelligence in advance - including the theological objection, the “Lady Lovelace” objection that machines can only do what we tell them, and arguments from consciousness - and he predicted that by around the year 2000 machines would play the game well enough to fool an average judge for five minutes.
The honest note is that the Turing test has aged into a point of contention. A chatbot can pass a short version by mimicking surface conversation without any understanding, and modern AI is often judged by capability benchmarks rather than imitation. Turing’s deeper contribution was not the test itself but the insistence that intelligence should be assessed by what a system can do, not by what it is made of.