“Instruction tables will have to be made up by mathematicians with computing experience and perhaps a certain puzzle-solving ability. There need be no real danger of it ever becoming a drudge, for any processes that are quite mechanical may be turned over to the machine itself.”
"Proposed Electronic Calculator" (1946), a report for National Physical Laboratory, Teddington; published in A. M. Turing's ACE Report of 1946 and Other Papers (1986), edited by B. E. Carpenter and R. W. Doran, and in The Collected Works of A. M. Turing (1992), edited by D. C. Ince, Vol. 3.
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Alan Turing 33
British mathematician, logician, cryptanalyst, and computer… 1912–1954Related quotes

[Michael Atiyah, Collected works. Vol. 6, The Clarendon Press Oxford University Press, Oxford Science Publications, http://www.math.tamu.edu/~rojas/atiyah20thcentury.pdf, 978-0-19-853099-2, 2160826, 2004]

Source: Moral Consciousness and Communicative Action (1983), p. 5

2010s, 2015, Speech on (20 July 2015)

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“The way I think about puzzles is a real puzzle, is something you may not ever figure out.”
Q&A session https://www.youtube.com/watch?v=WK9nxanN9BM&t=2060s at Graz Technical University, November 2017

“A mathematician is a machine for turning coffee into theorems.”
Widely attributed to Erdős, this actually originates with Alfréd Rényi, according to My Brain Is Open : The Mathematical Journeys of Paul Erdos (1998) by Bruce Schechter, p. 155
Misattributed
Variant: A mathematician is a device for turning coffee into theorems.