The question should not be whether or not people have "free will" over their actions, since free will is impossible to emperically measure. Rather, the questi

The question should not be whether or not people have "free will" over their actions, since free will is impossible to emperically measure. Rather, the question should be whether deterrence and/or rehabilitation have measurable impacts on how people behave. Does Policy X reduce Crime Y? If yes, then it doesn't matter if people have free will or not, Policy X is effective. If no, then it doesn't matter if people have free will or not, Policy X is not effective. Either way the cookie crumbles, free will doesn't matter. So the question of free will is quite literally irrelevant.