Quote by Alan Turing
"There is no room for doubt about machines; doubt itself can be computed."
More from Alan Turing
"I believe that at the end of the century the use of words and general educated opinion will have altered so much that one will be able to speak of machines thinking without expecting to be contradicted."
"The question 'Can machines think?' I believe is too meaningless to deserve discussion."
"Computing is normally done by a human being. The human computer is supposed to be following fixed rules; he has no authority to deviate from them in any detail."
"We may hope that machines will eventually compete with men in all purely intellectual fields."