Alan Turing — "If a machine can pass the Turing Test, then it is intelligent."
If a machine can pass the Turing Test, then it is intelligent.
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More from Alan Turing
"The computer is a universal machine."
"The only way to do great work is to love what you do."
"Machines take me by surprise with great frequency."
"The machine can only do what we tell it to do. But what if we tell it to learn?"
"The problem of intelligence is a very difficult one."
Details
Paraphrase of the core idea of the Turing Test, often simplified. Not a direct quote in this precise wording from 'Computing Machinery and Intelligence', but accurately reflects his concept.
Date: 1950 (concept)
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Understanding this quote
What it means
Intelligence should be judged by behavior, not biology. If a machine converses so convincingly that a human cannot distinguish it from another human, it meets the practical standard for intelligence. Rather than debating what intelligence is philosophically, this defines it by what it does — replacing an unanswerable metaphysical question with a concrete, repeatable test anyone can administer, making machine intelligence measurable rather than mystical.
Relevance to Alan Turing
Turing proposed this exact framework in his landmark 1950 paper "Computing Machinery and Intelligence," calling it the Imitation Game. As architect of theoretical computation — the Turing machine — he favored operational definitions that could be evaluated objectively. His wartime codebreaking at Bletchley Park showed machines could surpass human cognition on specific tasks, reinforcing his conviction that behavioral output, not biological substrate, is the proper measure of intelligence.
The era
In 1950, the first electronic computers — ENIAC, EDSAC, Manchester Mark 1 — had barely been built, and most scientists viewed machines as mere calculators. Philosophy of mind actively debated consciousness and free will. Cold War urgency was pushing governments to fund computing research. Turing's proposal gave the nascent AI field a concrete, provocative benchmark that unified researchers and captured public imagination for decades, effectively launching artificial intelligence as a discipline.
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