Indefiniteness of the predicate may avoid exclusivity or prior identification and, in a suitable context, convey magnification or disparagement. Specification of the predicate adds annexation or description, making the assertion narrower and more informative. Definiteness of the predicate can connect known descriptions and sometimes convey restriction of a category.
The central result is that a definite predicate does not always imply exclusivity, just as an indefinite predicate does not automatically belittle. Context, prior knowledge and rhetorical purpose determine the meaning.
The next topic examines a predicate expressed as an entire clause rather than a simple term. That discussion introduces new issues of strengthened predication, linking pronouns, and verbal versus nominal clauses.