«وعمرو شاعر»
And Amr is a poet.
Amr is a proper name; poet denotes a quality or ability. The concepts differ, but if Amr is a poet the quality is realized in that person.
Invalid inference: Everyone who is a poet must be Amr.
Valid interpretation: The predication concerns Amr; the concept poet may also apply to many other persons.
Identity of referent in a true predication does not establish synonymy or make every bearer of the predicate identical with the subject.