Even in the nominalistic epoch we have Raymond of Sabunde's Natural Theology (according to the article in Herzog-Hauck, not the title of the oldest Paris MS., but found in later MSS.
He is definitely anti-Platonic, and his language sometimes takes even a nominalistic tone, as when he declares that the species is nothing more than a thought or conception gathered from the substantial similarity of a number of dissimilar individuals.
The collected works of Hrabanus himself contain nothing new, but in some glosses on Aristotle and Porphyry, first exhumed by Cousin, there are several noteworthy expressions of opinion in a Nominalistic sense.
More intimately connected with the progress of philosophical thought was the tritheistic view of the Trinity propounded by Roscellinus as one of the results of his Nominalistic theory of knowing and being.
In opposition to this Nominalistic view, which implied the reversal of his whole position, William may have meant to say that, instead of the universal being multiplied, it is rather the individuals which are reduced to unity in the universal.
Difference of opinion as to his system, some, like Ritter and Erdmann, regarding it as a moderate form of Realism - a return indeed to the position of Aristotle - while others, like Cousin, Remusat, Haureau and Ueberweg, consider it to be essentially Nominalistic, only more prudently and perhaps less consistently expressed than was the case with Roscellinus.
Abelard's application of dialectic to theology betrayed the Nominalistic basis of his doctrine.
Of the alternatives three Gods or una res - which his Nominalistic logic presented to Roscellinus, Roscellinus had chosen the first; Abelard recoiled to the other extreme, reducing the three Persons to three aspects or attributes of the Divine Being (Power, Wisdom and Love).
In Mill's inductive logic, the nominalistic convention has, through his tendency to think in relatively watertight compartment,s, 2 faded somewhat into the background.