I once envisioned a matter call "Doesn't Matter" as a possible extension to "Dark Matter" and "Antimatter". I have the feeling that "Doesn't Matter" is far more wide spread than matter, dark matter and antimatter but it seems to be even more elusive, not interacting at all with anything else.
When I read the title of this post, I thought "Doesn't Matter" had suddenly been discovered and given the property of non-determinism. Which would actually fit quite well to its core physical manifestation.
/s