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"Could a machine think?" my own view is that only a machine could think, and indeed only very special kinds of machines, namely brains and machines that had the same causal powers as brains... Whatever else intentionality is, it is a biological phenomenon, and it is as likely to be as causally dependent on the specific biochemistry of its origins as lactation, photosynthesis, or any other biological phenomena. — John R. Searle · 1980The reason that no computer program can ever be a mind is simply that a computer program is only syntactical, and minds are more than syntactical. Minds are semantical, in the sense that they have more than a formal structure, they have a content. — John R. Searle · 1984
The Analytical Engine has no pretensions whatever to originate anything. It can do whatever to originate anything. It can do whatever we know how to order it to perform. It can follow analysis; but it has no power of anticipating any analytical relations or truths. — Ada Lovelace · 1843
I propose to consider the question, "Can machines think?" — Alan Turing · 1950
The real question is not whether machines think but whether men do. — B.F. Skinner · 1969
We are on the edge of change comparable to the rise of human life on Earth. The precise cause of this change is the imminent creation by technology of entities with greater than human intelligence. — Vernor Vinge · 1993