What Freedom in a Deterministic World Must Be

Contrary to Lewis (1981) and Vihvelin (2013), I argue that free will in a deterministic world is an ability to break a law of nature or to change the remote past. Even if it were true, as Lewis and Vihvelin think, that an agent who is predetermined to perform a particular act might not break a law or change the remote past by doing otherwise, it would nevertheless be true that he is able to do otherwise only if he is able to break a law or to change the remote past.