Abstract
In this paper I try to give an account of necessary and sufficient conditions of true freedom of action, of true or ultimate responsibility, even while acknowledging that such ultimate responsibility is impossible, because one of the conditions—being causa sui, or absolutely self-originating—is unfulfillable. I consider various forms of the ‘able-to-choose’ condition on freedom, and summarize the argument in part III of my book Freedom and Belief for the seemingly paradoxical claim that one of the conditions of truly free action is believing that you are free. Much of the discussion is intended as a contribution to the phenomenology of agency and in particular the phenomenology of the experience of freedom.