I think it's clearly true that we have internal processes which cause us to take actions. If those processes are entirely deterministic then that means every a

I think it's clearly true that we have internal processes which cause us to take actions. If those processes are entirely deterministic then that means every action you take is also deterministic - as in, you could not have acted otherwise. When there are two choices laid out before you, you "choose" one in the same sense that an NPC in a video game chooses its actions: by running a complex set of internal logic. "Free will" is the notion that you have the freedom to exert your will to choose courses of action. Even though you chose to do A, you could have instead have chosen to do B.