Douglas R. Hofstadter and Daniel C. Dennett
Publisher: Bantam Books (1982)

Creatures react appropriately to events within the scope of their senses; they recognize things, avoid painful experiences, learn, plan, and solve problems. They exhibit intelligence. But putting matter this way might be held to prejudge the issue. Talking of their “senses” or of “painful” circumstances, for instance suggests that we have already settled the issue of consciousness -- for note that had we described a robot in those terms, the polemical intent of the choice of words would have been obvious (and resisted by many). How do creatures differ from robots, real or imagined? By being organically and biologically similar to us – and we are the paradigmatic conscious creatures.