It's the stuff that isn't altered by perception.
This isn't that complicated, but I'm done arguing the same point over and over.
What you're talking about is a matter of perception, and thus, subjective. What I'm talking about is the stuff that doesn't change no matter how you view it or feel about it - the objective reality. Simple. End of story.
And that's it - I just don't feel like debating that same point again. Forgive me if I opt out.