Can a declarative English sentence be put into standard form as a categorical proposition if its subject is a pronoun?

Question

Quizplus · Accepted Answer

While a pronoun does not provide enough information to serve as a subject on its own, it can be replaced with its antecedent to create a declarative sentence which can then be put into standard form as a categorical proposition. It is preferable to replace the pronoun with its antecedent in order to provide clarity and avoid ambiguity.

Can a Declarative English Sentence Be Put into Standard Form