facts speak louder than words; the truth of the situation is more convincing than any argument

eloquent and persuasive speech that flows like a continuous torrent; a powerful, uninterrupted argument

a skilled public speaker; an eloquent rhetorician or elocutionist

(of an argument) powerful and unceasing; being very eloquent or persuasive in debate

A vigorous debate or eloquent and lofty discourse; powerful and unrestrained talk.