Free will (n.) and determinism are both unsatisfying because the confusion lies in the tangle of our thoughts, not in the knot of the world.
Free will (n.) in its deepest Christian sense is acting in union with God — not from fear, pride or hope of reward, but with the baseless love of the unmoved mover.
Free will (n.) can never be shown — nor can necessity — except by ignoring an act's full context; and since the context always changes, no action can be repeated.
Free will (n.) is taught to every child as make-believe — he is a miniature First Cause — and he accepts it for the very reason that it is not true.
Free will (n.) is how a detached, uprooted entity feels, acting freely in a void — the feeling that follows once "I" is identified with consciousness.
Free will (n.) and determinism are equally cogent because each is true when looked at alone: everything happens by itself, and I am doing all of it.