 A person has free will if he is often in positions like these: he must now speak or be silent, and he can now speak and can now remain silent; he must attempt to rescue a drowning child or else go for help, and he is able to attempt to rescue the child and able to go for help; he must now resign his chairmanship or else lie to the members; and he has it within his power to resign and he has it within his power to lie. (van Inwagen 1983: 8)