Medieval Nominalism and classical Reformed soteriology (i.e., the doctrine or belief about salvation) go hand-in-hand.

“Nominalism is a metaphysical view in philosophy according to which general or abstract terms and predicates exist, while universals or abstract objects, which are sometimes thought to correspond to these terms, do not exist.” (Wiki)

Classical Reformed soteriology (and the bulk of Protestantism) says “You’re declared righteous in God’s eyes, but you’re not REALLY righteous. It is an extrinsic ‘declaration’ about a Person, not a ‘change-in-reality.’”

In other words, God accepts a lie, and doesn’t really demand that we be “Holy as He is Holy.”

Doesn’t sound right, does it? It certainly doesn’t agree with St Peter’s remarks that we “become partakers of divine nature, having escaped the corruption which is in the world by desire.” (2nd Catholic Epistle, 1.4)

More in this excellent post.