Alan Turing — "The question is not 'Can machines think?' but 'Can machines do what we (as think…"
The question is not 'Can machines think?' but 'Can machines do what we (as thinking entities) can do?'
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More from Alan Turing
"The machine has to be able to do something which it has never been programmed to do."
"A computer is a universal machine. It can do anything that can be described as a computation."
"A man provided with paper, pencil, and rubber, and subject to strict discipline, is in effect a universal machine."
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"A smallish proportion are supercritical. An idea presented to such a mind may give rise to a whole 'theory' consisting of secondary, tertiary and more remote ideas. Animals' minds seem to be very defi…"
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Interpretation of his work, not a direct quote but often attributed as his underlying sentiment.
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Understanding this quote
What it means
The quote shifts debate from abstract philosophy to practical behavior. Instead of wrestling with whether machines possess genuine thought — a question tangled in consciousness and semantics — Turing argues we should ask whether machines can perform every task a thinking human can. If behavior is indistinguishable, the internal mechanism becomes irrelevant. It's a pragmatist's redirection: define intelligence by outputs and capabilities, not by unknowable internal experience.
Relevance to Alan Turing
Turing published this idea in his landmark 1950 paper 'Computing Machinery and Intelligence,' proposing the Imitation Game — now called the Turing Test. Having cracked Nazi Enigma ciphers at Bletchley Park using mechanical reasoning, he knew machines could execute complex logical tasks. As a gay man prosecuted by his own government for who he was internally, he understood firsthand how unjust it is to judge inner life from the outside. Functional equivalence was personal conviction.
The era
In 1950, the first electronic computers were barely five years old. World War II had demonstrated machines could perform feats of computation humans couldn't — breaking codes at superhuman speed. The Cold War was accelerating investment in computing. Yet philosophers and theologians fiercely resisted the idea that machines could rival human minds. Turing's reframing arrived precisely when society needed it: a clear, testable standard replacing an unanswerable metaphysical argument about consciousness.
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