The first test realizes a possibility that philosophers have overlooked: a test that uses a human's linguistic performance in setting an empirical test of intelligence, but does not make behavioral similarity to that performance the criterion of intelligence. This is more appropriate because the question under consideration is what would count as machine intelligence. This is because the features of intelligence upon which it relies are resourcefulness and a critical attitude to one's habitual responses thus the test's applicablity is not restricted to any particular species, nor does it presume any particular capacities. The two tests can yield different results it is the first, neglected test that provides the more appropriate indication of intelligence. I show here that the first test described in that much-discussed paper is in fact not equivalent to the second one, which has since become known as `the Turing Test'.

On a literal reading of `Computing Machinery and Intelligence', Alan Turing presented not one, but two, practical tests to replace the question `Can machines think?' He presented them as equivalent.

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