Well for one thing, there appear to be non-deterministic systems (possibly real ones, definitely conceived ones) that we would never say have free will. If x is a radioactive atom whether or not it decays in the next minute is undetermined. But the atom does not have free will. And actually, it is hard to make sense of what free will would be if it was just a lack of determinism since the extent to which an event is undetermined is also the extent to which it is random. One cannot control something that is random. But free will means having control over our actions. Ergo: if our actions are free they cannot be undetermined.
(And I know the particle decay picture is resolved differently with MW, but we don’t have any other non-deterministic systems to talk about.)
Well for one thing, there appear to be non-deterministic systems (possibly real ones, definitely conceived ones) that we would never say have free will. If x is a radioactive atom whether or not it decays in the next minute is undetermined. But the atom does not have free will. And actually, it is hard to make sense of what free will would be if it was just a lack of determinism since the extent to which an event is undetermined is also the extent to which it is random. One cannot control something that is random. But free will means having control over our actions. Ergo: if our actions are free they cannot be undetermined.
(And I know the particle decay picture is resolved differently with MW, but we don’t have any other non-deterministic systems to talk about.)