I think that various styles and methods and approaches are an invention of people who don't understand the process of acting and who try very hard to label things.
“I didn't write this song. Someone was talking in a room. I just wrote down everything they said.”
“I don't begin a novel or a screenplay until I know the ending. And I don't mean only that I have to know what happens. I mean that I have to hear the actual sentences. I have to know what atmosphere the words convey.”