It's impossible to be a pure empiricist because you must translate your experience of reality into a conceptual representation in order to think about it at all.
Perhaps you can be purely empiricist if you have no conscious awareness. But if you are conscious, you can approximate empiricism by maintaining awareness of the distinction between reality and your understanding of it.
Perhaps you can be purely empiricist if you have no conscious awareness. But if you are conscious, you can approximate empiricism by maintaining awareness of the distinction between reality and your understanding of it.