a posteriori

A posteriori physicalism is the combination of two appealing views: physicalism (that is, the view that all facts are either physical or entailed by the physical), and conceptual dualism (that is, the view that phenomenal truths are not entailed a priori by physical truths).

Suarez claims, nonetheless, that once the existence of God has been demonstrated a posteriori, it is possible to demonstrate the unicity of God in an a priori manner, although he concedes that it is not easy to do so.