Schopenhauer denies that our own self-understanding, our self-consciousness, displays our real freedom. We can interpret him as criticizing this argument: I am not conscious of the causal background needed for me to do Y. I know I sometimes do Y. So, I am conscious that there is no causal background needed for me to do Y. His point is that this argument is invalid. Being unconscious of something cannot be parlayed into being conscious of its absence.
