What is reality? What is illusion?
I do not mean which things are real and which things are illusory but what is realness itself and what is illusion itself. Telling which is which is not useless or discouraged, but if you will, can you explain why this is real and that is not?
Reality, by definition, requires verifiability.
Exist, by definition, requires verifiability.
Truth, by definition, requires fact.
Fact, by definition, requires indisputable verifiability.
Only scientifically observable, empirical evidence can be properly described with the terms, reality, exist, truth, and fact.
What I have described so far, can be categorically identified with the term Quanta (quantifiable, verifiable).
A key characteristic of Quanta is that it is value-neutral.
Everything that we humans find meaningful and important is Qualia (qualitative, experiential).
Concepts like, faith, hope, love, free will, and infinity are categorically Qualia.
Qualia may or may not qualify as "illusion" (depending on how you prefer to define "illusion") but Qualia does not (and can never) qualify as either extant, real, true, or fact.