## Alan Turing: The EnigmaA gripping story of mathematics, science, computing, war history, cryptography, and homosexual persecution and liberation. Hodges tells how Turing's revolutionary idea of 1936-- the concept of a universal machine-- laid the foundation for the modern computer. Turing brought the idea to practical realization in 1945 with his electronic design. This work was directly related to Turing's leading role in breaking the German Enigma ciphers during World War II, a scientific triumph that was critical to Allied victory in the Atlantic. Despite his wartime service, Turing was eventually arrested, stripped of his security clearance, and forced to undergo a humiliating treatment program-- all for trying to live honestly in a society that defined homosexuality as a crime. This New York Times bestselling biography of the founder of computer science and artificial intelligence is the definitive account of an extraordinary mind and life. --Excerpted from 2014 version, published by Princeton University Press. |

### From inside the book

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Page 91

It did not attempt to answer the

that of what mathematics really was. ... On the other hand, it was more far-

reaching in that it asked profound and difficult

as ...

It did not attempt to answer the

**question**which Frege and Russell had tackled,that of what mathematics really was. ... On the other hand, it was more far-

reaching in that it asked profound and difficult

**questions**about the systems suchas ...

Page 134

Although the prime numbers were such ordinary things, it was easy to pose quite

baffling

early on. Euclid had been able to show that there were infinitely many prime ...

Although the prime numbers were such ordinary things, it was easy to pose quite

baffling

**questions**about them in a few words. One**question**had been solved veryearly on. Euclid had been able to show that there were infinitely many prime ...

Page 417

ACIS: Can he answer a

I believe to be too ... But it was most important that the 'imitation game' would

allow

ACIS: Can he answer a

**question**? ... The original**question**, 'Can machines think?'I believe to be too ... But it was most important that the 'imitation game' would

allow

**questions**about anything whatever, not just about mathematics or chess.### What people are saying - Write a review

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Alan Turing Alan Turing's Alan wrote Alan's American AMT's arithmetic Bletchley Bletchley Park Bombe boys brain Britain British calculation called Cambridge cathode ray tube chess Christopher cipher Computable Numbers cryptanalytic Darwin delay line Delilah digits discussion Don Bayley Donald Michie EDVAC electronic enciphered engineering ENIAC Enigma machine explained fact G.H. Hardy German Hanslope Hilbert homosexual human idea instructions intelligence interest kind King's knew letter logical Manchester mathematician mathematics Max Newman mechanical messages method mind Morcom naval Enigma Neumann never Newman operations organisation paper perhaps Peter Hilton physical play plugboard position possible Princeton problem question Robin Gandy rotor scientific secret Shaun Wylie Sherborne signals symbols talk tape teleprinter theorem theory thing thought took Turing machine U-boat universal machine Womersley word writing