In his 1950 paper, Alan Turing replaced “Can machines think?” with a more practical question: can a machine converse well enough that a human interrogator cannot tell it from a person? This proposal became known as the Turing test, or imitation game. section 9.3.4
The test shifts attention from defining intelligence to judging observable performance. Turing offered it as a way to attribute intelligence in practice, not as a definition of intelligence itself. section 9.3.4

