I am talking about a closer analogy to human purposeful behaviour. When we watch an animal ‘searching’ for food, or for a mate, or for a lost child, we can hardly help imputing to it some of the subjective feelings we ourselves experience when we search. These may include ‘desire’ for some object, a ‘mental picture’ of the desired object, an ‘aim’ or ‘end in view’. Each one of us knows, from the evidence of our own introspection, that, at least in one modern survival machine, this purposiveness has evolved the property we call ‘consciousness’.
