What Is Eretical?

i'm trying to capture possibilities that intuitively seem to me to cohere with the way that i take the world to be. We know that we can give a materialist characterization, but when does an experience get to be not veretical? Yes, there's a sense in which i think, i don't answer is going to be completely unsatisfying. And im that is sort of what i'm aiming at, being able to characterize in an idealist way.