Just to add to this. The problem with "free will" is logical, as well as a scientific. The idea of "free will" that many people seem to have (including you, from your inability to see that the determinism-randomness dichotomy isn't about the material universe) is simply inconsistent and self-contradictory.
Presumably, theists such as AB will
argue assert that God is uncaused; therefore, they might also say that the soul is uncaused, and free will also. Although, possibly the soul is 'created' by God, hence caused by God, so here there is some determinism, and free will is created by the soul, ditto. But this ignores the ability of AB to move the goal-posts at will, in fact, there is a complete bonfire of goalposts. Nobody knows how the soul operates, since nobody knows what it is, except an unspecified 'something'. Of course, this is very useful, since it allows AB to contradict himself, misrepresent other people, and so on. Just like that.