Well, yes. Actually it does matter. Modern materialistic approach lets us assume that physical laws (no matter if we know them or not) are universal and applicable to anything. “Dream” concept leaves us in total chaos without even a theoretical chance to figure out how things work. It even has totally crazy synchronization problems between different “dreamers” if there are a few of them. There isn’t a single question that is answered by Machism. Absolute religion-tier stupidity.

So it does matter.

I forgot how this direction of philosophy was called. Avenarius was one of the main names… But it was debunked by philosophers themselves somewhere in the middle of the XIX century.

I have neighbours to remedy that: no reason to go to bed until midnight.