If you don't like this "nolueris" and "debueris," because it is the trick of isocrates, and altogether nonsensical and puerile, I don't waste my time on the matter.
"The Roman Poets of the Republic"
W. Y. Sellar
Dionysius especially shows Demosthenes's great care in the matter of rhythm, and instances as examples of artistic finish among the Greeks the fact that isocrates worked ten years on his Panegyrics.
"The Literature of Ecstasy"
Albert Mordell
The Athenians had explicitly stated to the Great King in 341 that such was the Macedonian's ambition, and four years earlier public suggestion of it had been made by the famous orator, isocrates, in an open letter written to Philip himself.
"The Ancient East"
D. G. Hogarth