He violently attacked Politian (Poliziano), whose Miscellanea (a collection of notes on classical authors) were declared by Merula to be either plagiarized from his own writings or, when original, to be entirely incorrect.
Philo taught that Greek philosophy had been plagiarized from Moses.
Ideas in one product area are frequently plagiarized and adapted for other products.
Whose job is it to actually see if someone has actually plagiarized in publication?
Further investigation showed that he also not only plagiarized work while in law school but also exaggerated his academic record.