Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Some have added a sixth department, subjoining judgment to invention, on the ground that it is necessary first to invented and then to exercise our judgment. For my own part I do not believe that invention can exist apart from judgement, since we do not say that a speaker has invented incousistent, two-edged or foolish arguments, but merely that he has failed to avoid them. It is true that Cicero in his Rhetorica [*]( No such statement is found in the de Inventione. )
includes judgment under mention; but in my opinion judgment is so inextricably mingled with the first three departments of rhetoric (for without judgment neither expression nor arrangement are possible), that I think that even delivery owes much to it. I say this with all the greater confidence because Cicero in