Alan Turing — "If you cannot explain it simply, you do not understand it well enough."

"The question is not whether machines can think, but whether they can do something that we would call thinking."

"The digital computers of today are in principle exactly the same as the universal machines I described."

"The machine has a definite state at any moment, which is determined by the instructions it has received and by the results of its previous operations."

"Mathematics, rightly viewed, possesses not only truth, but supreme beauty—a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous trapp…"

"The possibility of a machine thinking is a disturbing thought for many people."