Alan Turing — "The machine should be able to carry out logical deductions."
The machine should be able to carry out logical deductions.
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More from Alan Turing
"No doubt I shall emerge from it all a different man, but quite who I've not found out."
"The machine has to be able to do something which it has never been programmed to do."
"The human brain is a very remarkable thing, but it is not infallible."
"One day ladies will take their computers for walks in the park and tell each other, 'My little computer said such a funny thing this morning'."
"The machine should be able to communicate with human beings."
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Understanding this quote
What it means
A computing machine shouldn't merely crunch numbers — it must be capable of following logical rules, drawing conclusions from premises, and reasoning through structured problems. This is the foundation of what we now call artificial intelligence: the idea that machines can do more than arithmetic, they can think systematically, infer outcomes, and process meaning the same way a trained human mind works through a formal argument.
Relevance to Alan Turing
Turing's entire career embodied this principle. His 1936 paper on computable numbers established the theoretical framework for rule-following machines. At Bletchley Park, his Bombe machines performed systematic logical deductions to crack Nazi Enigma codes, saving millions of lives. His landmark 1950 paper 'Computing Machinery and Intelligence' pushed further, asking whether machines could genuinely think — the natural endpoint of believing logic is the bridge between human and machine cognition.
The era
In the 1940s and early 1950s, computers were considered glorified calculators — useful for ballistics tables and census arithmetic, nothing more. The notion that a machine could reason was philosophically controversial; many scientists and philosophers held logic as uniquely human. Turing made this claim amid a postwar world racing to harness technology for Cold War advantage, when faster, smarter information processing suddenly had existential stakes for entire nations.
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