 Incompatibilists hold that free will and determinism are mutually exclusive and, consequently, that we act freely (i.e., with free will) only if determinism is false. However, they disagree amongst themselves about what else, besides indeterminism, is required for free will. One question that divides them concerns which type of indeterminism—uncaused events, nondeterministically caused events, or agent caused events—is required. Another concerns where in the processes leading to action indeterminism must be located in order for an action to be free. Different answers to these questions yield different incompatibilist theories of free will.