Space is not 'nothing'. It may be no 'thing', but that is not the same as 'nothing'. It is probably the most overlooked aspect of cognition. Just as the goldfish in its bowl does not include the no-thingness of its water (or rather, the clarity of its water) in its cognition of things, so we tend to disregard  the space within which our cognitive processes function. I say within which our cognitive processes function, because the evidence is that we do not think within our heads, but within our perceptual space. The totality of human subjective experience would seem to be an intimate interaction between the body , the Perceptual Space and its Generative Source (not considered within the scope of this article).