Note 46 — Chapter IV · DE INTERPRETATIONE.
Reading edition
Aristot. De Interpr. p. 21, a. 32: τὸ δὲ μὴ ὄν, ὅτι δοξαστόν, οὐκ ἀληθὲς εἰπεῖν ὄν τι· δόξα γὰρ αὐτοῦ οὐκ ἔστιν ὅτι ἔστιν, ἀλλ’ ὅτι οὐκ ἔστιν. Τὸ μὴ ὄν is the true description of that which Aristotle improperly calls δύναμις ἣ οὐδέποτε ἐνέργειά ἐστιν.
The triple enumeration given by Aristotle (1. Actuality without Potentiality. 2. Actuality with Potentiality. 3. Potentiality without Actuality) presents a neat symmetry which stands in the place of philosophical exactness.