I have an answer. Consider the opposite of free will. Things that aren't considered to have free will inherit their reasons for doing/being from the outside. A

I have an answer. Consider the opposite of free will. Things that aren't considered to have free will inherit their reasons for doing/being from the outside. A computer isn't considered to have free will, the reason for everything it does serves the purpose of the programmer or user. A piston doesn't push on its free will, but does so because of steam pressure and the steam pressure doesn't choose to be in the pipe, but is put there by the engineer to serve some design purpose. A person doing a job isn't generally expressing their free will. They are manifesting the will of their boss, who himself is manifesting the will of the company on up the chain. In general, the concept of reason for things (aka purpose) follows a hirearchy tree structure. X happens because Y wills it. Y wills it because Z wills it. And so on. Whenever we reach a node in this tree where we can't find the parent node, we are left with a free floating will. So long as there are things about our likes and dislikes and how we spend our time which can't be correlated with anything measurable, there is no choice but to attribute those things to our free will. The moment some component of who we are becomes predictable by science, we stop attributing that component to our free will.