ABSTRACT. Ontological reduction is by no means trivial, but a significant project in contemporary philosophy of mind. If reductionism is to succeed, it must meet a substantive burden of proof to show that psychological phenomena are reducible in the sense of being nothing but or fully satisfactorily explainable in terms of purely nonmental, nonpsychological, and nonintentional phenomena. If reductionism is to be defeated in the name of ontic subjectivity and the metaphysical dignity of mind, then reductionism must be met head-on by its opponents as a meaningful if finally unsound attempt to explain away qualia and the intentionality of thought.