Alan Turing — "The human brain is an electrical machine."

"The original question, 'Can machines think?' I believe to be too meaningless to deserve discussion."

"I propose to consider the question, 'Can machines think?' This should begin with definitions of the meaning of the terms 'machine' and 'think.'"

"The question is not 'Can machines think?' but 'Can machines do what we (as thinking entities) can do?'"

"The machine should be able to understand what it is doing."

"I do not wish to give the impression that I think there is no mystery about consciousness. There is, for instance, something of a paradox connected with any attempt to localize it."