Phaed 101b

[Constantinus Philo]

οὐκοῦν, ἦ δ᾽ ὅς, τὰ δέκα τῶν ὀκτὼ δυοῖν πλείω εἶναι, καὶ διὰ ταύτην τὴν αἰτίαν ὑπερβάλλειν, φοβοῖο ἂν λέγειν, ἀλλὰ μὴ πλήθει καὶ διὰ τὸ πλῆθος; καὶ τὸ δίπηχυ τοῦ πηχυαίου ἡμίσει μεῖζον εἶναι ἀλλ᾽ οὐ μεγέθει; ὁ αὐτὸς γάρ που φόβος.
I don't understand why he uses in the first instance μη and then ου, the construction seems to be the same.

[Constantinus Philo]

i talked briefly to a prof of philosophy who can read greek and we both agreed that in this passage there is no difference between OUK and MH

[Constantinus Philo]

In disjunction in which one opposes a quality or a type of objects to another quality or type ουκ /μη are used indifferently, Humbert 629.