Nothing as a concept is a category of something. Pure nothing is unimaginable, and the unimaginable is still something. It is not darkness or silence or emptiness in unison. It is not whatever came before birth or what comes after death. It is not a concepts a priori or a words definition. It is not blessed oblivion. Perhaps pure nothing doesn't exist and that would be the closest point to it; but what doesn't exist is still something.

Perhaps "nothing" is the idea of a clock before it was thought of, before it's hands turned us into marionettes. This seems to be the same as before birth and is still something. The idea of something coming from nothing is still something.

The nothing before the universe is still something. We don't know what or that we don't know, and this is still something.

What is nothing? Nothing is nothing...a tautology.