Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Anaximenes regarded forensic and public oratory as genera but held that there were seven species :— exhortation, dissuasion, praise, denunciation,
I say nothing of Protagoras, who held that oratory was to be divided only into the following heads: question and answer, command and entreaty, or as he calls it εὐχωλή. Plato in his Sophist [*](222 o.) in addition to public and forensic oratory introduces a third kind which he styles προσομιλητική, which I will permit myself to translate by
conversational.This is distinct from forensic oratory and is adapted for private discussions, and we may regard it as identical with dialectic.
Isocrates [*]( Fr. 3 s. ) held that praise and blame find a place in every kind of oratory.
The safest and most rational course seems to be to follow the authority of the majority. There is, then, as I have said, one kind concerned with praise and blame, which, however, derives its name from the better of its two functions and is called laudatory; others however call it demonstrative. Both names are believed to be derived from the Greek in which the corresponding terms are encomiastic, and epideictic.
The term epideictic seems to me however to imply display rather than demonstration, and to have a very different meaning from encomiastic. For although it includes laudatory oratory, it does not confine itself thereto.