> In De Anima III.2, Aristotle writes:
>
> "Since it is through sense that we are aware that we are seeing
> or hearing, it must be either by sight that we are aware of seeing,
> or by some sense other than sight. But the sense that gives us this
> new sensation must perceive both sight and its object, viz. color:
> so that either (1) there will be two senses both percipient of the
> same sensible object, or (2) the sense must be percipient of itself.
> Further, even if the sense which perceives sight were different
> from sight, we must either fall into an infinite regress, or we must
> somewhere assume a sense which is aware of itself. If so, we
> ought to do this in the first case."
>
> Aristotle seems to be arguing that unless consciousness is reflexive,
> there must be a logical fallacy in our understanding of consciousness.
> A little while ago I was conscious of birdsong, but at that time I was not
> conscious of my consciousness of the birdsong, so the proposition that
> consciousness is reflexive is clearly false. What, then, are we to make
> of the impression that we are conscious of our own consciousness?
>
> The idea rests upon the impression that there is a subject of consciousness
> over and against the objects that constitute the world, an 'experiencer'
> over and against the 'experienced'. But, consistent with the use of the term
> 'consciousness' to refer to the brute fact of the existence of the epistemic
> "all there is" (i.e. the existence of this "subjective perspective" upon a
> world), where would this subject/experiencer reside? Would it reside
> outside this "all there is" looking in? If so then we seem to have fallen
> into substance dualism, and William James quite rightly dispensed with
> the idea of consciousness as substance in his 1904 essay
> "Does Consciousness Exist?":
http://psychclassics.yorku.ca/James/consciousness.htm
>
> It should be clear that the consciousness of consciousness amounts to
> nothing more than the fact that the very *idea* of the existence of the
> epistemic "all there is" may be entertained as part of the contents of the
> "all there is". When we are entertaining that idea we might say that we
> are conscious of our own consciousness, but most of the time we don't
> entertain that idea -- we simply get on with our lives. The upshot is that
> consciousness is *not* reflexive, and that it is our understanding of
> consciousness that needs to be addressed -- specifically the
> interdependent ideas of subject and object.