Originally posted by -Aarya-
We have been down this road many times in other posts regarding this topic, it seems be most circular reference item in DM :)
Anyways, I will just leave you with this thought...
Can you observe "nothing", or conceive infinity, or a universe that always existed because we cannot process infinity...
The crux of the debate concerns itself with what is fundamentally real so from that standpoint your questions were on the right track.
When hashing over linguistics (for instance, you said nobody knows
what is really real) things have come full circle back to space-time because, prima facie, that's where reality as we know it is playing out, so a convergence of a few concepts that you think we already covered in other topics is but expected.
As for the question - can we observe "nothing": see, not all questions are logically valid as in they might not have a reasonable answer. One such example would be "what is the area of a square-circle?" Another would be "what color is sour?"
However, if by "nothing" you mean empty space or vacuum, then yes, it is measurable as that too has zero-point energy. Observation is not "seeing", it is measurement in scientific terms.
