 There are several different ideas that are being run together here, and that it is profitable to disentangle. One idea—the one upon which Turing first focuses—is the idea that the only way in which one could be certain that a machine thinks is to be the machine, and to feel oneself thinking. A second idea, perhaps, is that the presence of mind requires the presence of a certain kind of self-consciousness (“not only write it but know that it had written it”). A third idea is that it is a mistake to take a narrow view of the mind, i.e. to suppose that there could be a believing intellect divorced from the kinds of desires and emotions that play such a central role in the generation of human behavior (“no mechanism could feel …”).