7.1.42
Τὸ μὲν οὖν περὶ κανόνων καὶ κριτηρίων παραλαμβάνουσι πρὸς τὸ τὴν ἀλήθειαν εὑρεῖν· ἐν αὐτῷ γὰρ τὰς τῶν φαντασιῶν διαφορὰς ἀπευθύνουσι. καὶ τὸ ὁρικὸν δὲ ὁμοίως πρὸς ἐπίγνωσιν τῆς ἀληθείας· διὰ γὰρ τῶν ἐννοιῶν τὰ πράγματα λαμβάνεται. τήν τε ῥητορικὴν ἐπιστήμην οὖσαν τοῦ εὖ λέγειν περὶ τῶν ἐν διεξόδῳ λόγων καὶ τὴν διαλεκτικὴν τοῦ ὀρθῶς διαλέγεσθαι περὶ τῶν ἐν ἐρωτήσει καὶ ἀποκρίσει λόγων· ὅθεν καὶ οὕτως αὐτὴν ὁρίζονται, ἐπιστήμην ἀληθῶν καὶ ψευδῶν καὶ οὐδετέρων.
Καὶ τὴν μὲν ῥητορικὴν αὐτὴν εἶναι λέγουσι τριμερῆ· τὸ μὲν γὰρ αὐτῆς εἶναι συμβουλευτικόν, τὸ δὲ δικανικόν, τὸ δὲ ἐγκωμιαστικόν.
7.1.43
Εἶναι δʼ αὐτῆς τὴν διαίρεσιν εἴς τε τὴν εὕρεσιν καὶ εἰς τὴν φράσιν καὶ εἰς τὴν τάξιν καὶ εἰς τὴν ὑπόκρισιν. τὸν δὲ ῥητορικὸν λόγον εἴς τε τὸ προοίμιον καὶ εἰς τὴν διήγησιν καὶ τὰ πρὸς τοὺς ἀντιδίκους καὶ τὸν ἐπίλογον.
Τὴν διαλεκτικὴν διαιρεῖσθαι εἴς τε τὸν περὶ τῶν σημαινομένων καὶ τῆς φωνῆς τόπον· καὶ τὸν μὲν τῶν σημαινομένων εἴς τε τὸν περὶ τῶν φαντασιῶν τόπον καὶ τῶν ἐκ τούτων ὑφισταμένων λεκτῶν ἀξιωμάτων καὶ αὐτοτελῶν καὶ κατηγορημάτων καὶ τῶν ὁμοίων ὀρθῶν καὶ ὑπτίων καὶ γενῶν καὶ εἰδῶν, ὁμοίως δὲ καὶ λόγων καὶ τρόπων καὶ συλλογισμῶν καὶ τῶν παρὰ τὴν φωνὴν καὶ τὰ πράγματα σοφισμάτων·
