Alvin Plantinga was cited in my book, The Boundless Love of God: A Holy Spirit Story, stating that classical science does not claim that the universe is causally closed. His statement is entirely consistent with special divine action in the world. Just as God, who is immaterial and Spirit, can act in the physical universe, so too can the immaterial minds of human beings. There is no objection to special divine action or for human free action, dualistically conceived.