Regardless of whether one should “believe in free will,” a person can only logically and soundly conclude that s/he has the ability to choose between available options. In the first place, there is an undeniable stark difference between our voluntary acts and involuntary bodily movements: in the case of the former, we can foretell far in advance what we voluntarily will do, a fact that is accounted for only because one wills those acts.
But other than that, the conclusion that one can choose between available options is the only logical and sound conclusion because denial of such ability is self-stultifying, for similar reasons that the assertion of epiphenomenalism is self-stultifying. See the OP here: Like Epiphenomenalism, Denial of Free Will is Self-Stultifying Any such thoughts or assertions that an object that lacks the ability to choose between available options may think or assert are simply thoughts or assertions that the volitionless object cannot avoid thinking or asserting, and therefore have no truth value. An object that cannot choose between available options cannot choose to think or assert what is true in answer to the question of whether or not it has free will.
But other than that, the conclusion that one can choose between available options is the only logical and sound conclusion because denial of such ability is self-stultifying, for similar reasons that the assertion of epiphenomenalism is self-stultifying. See the OP here: Like Epiphenomenalism, Denial of Free Will is Self-Stultifying Any such thoughts or assertions that an object that lacks the ability to choose between available options may think or assert are simply thoughts or assertions that the volitionless object cannot avoid thinking or asserting, and therefore have no truth value. An object that cannot choose between available options cannot choose to think or assert what is true in answer to the question of whether or not it has free will.