@JPhil,
...the idea that something may be absent is quite different from the idea that everything its absent, and although the latter is an extrapolation of the former, such extrapolation is merely a symbolic abstraction, very much in danger of getting more the asked for, by means of wanting less...at this light the use of the term "nothing" must be taken in relative terms...normally we use to negate any of the present variables in an argument, which in reality is far different from negating all there is...that would negate even the necessity for a word or a symbolic representation of absolute emptiness given there would be nothing to relate any meaning to nor no one to understand it in the first place...bottom line is that ideas refer at least symbolically to "something" by means of representing conceptually the function it serves...in the case the function of "nothing" is relative to all that can be thought off at the moment which does n´t fit any given goal, thus necessarily excluding the one which is thinking from the void, that is, "nothing" as a function refers to the absence of a current value for any potential operator that the subject might come up with, such that there´s a relation of absence circumvented in form by the presence of everything else in relation with the subject which enquires and gets no answer...once "NOTHING" is about the cognitive self aware function of presently lacking functionality in a enquire, instead of an Absolute void, it all "messily" results in a tricky conceptual situation !
That in turn only means an Absolute Void, the so called NOTHING, does n´t exist...Nothing its nothing !