Or “How the Existence of Real Alternate Possibilities Theoretically Grounds Free Will”.
I recently discussed the non-existence of actual alternate possibilities, where “actual” describes that which obtains in the actual world. My view is simply that the actual world is singular, and propositions concerning it are either true or false.
This view, that propositions concerning the actual world each have a truth value, has the amazing implication that the future can be known. This is because, included among all propositions concerning the actual world are propositions concerning that part of the actual world which has not yet come to pass. And so, that propositions concerning our future each have a truth value mean that they too can be known.
There may be difficulties in procuring knowledge of the future of course, and so positing prescience may require one to also posit some practical mechanism for obtaining it. But the important point here is that one may know things concerning the future, because the future has no actual alternatives.