If a machine can think, it might think more intelligently than we do, and then where should we be? Even if we could keep the machines in a subservient position, for instance by turning off the power at strategic moments, we should, as a species, feel greatly humbled. … This new danger … if it comes at all … is remote but not astronomically remote, and is certainly something which can give us anxiety. It is customary, in a talk or article on this subject, to offer a grain of comfort, in the form of a statement that some particularly human characteristic could never be imitated by a machine. It might for instance be said that no machine could write good English, or that it could not be influenced by sex-appeal or smoke a pipe. I cannot offer any such comfort, for I believe that no such bounds can be set.

Alan Turing, quoted by Sebastian Sunday Grève in AI’s first philosopher:  https://aeon.co/essays/why-we-should-remember-alan-turing-as-a-philosopher

The real benefit of complex inferences like weighing uncertainty may not be apparent unless the uncertainty has complex structure.

Quoted in Science News, "There’s a long way to go in understanding the brain," 7/25/2017)