οὐ γάρ
From LSJ
Τὸν εὐτυχοῦντα καὶ φρονεῖν νομίζομεν → Fortuna famam saepe dat prudentiae → Von dem der glücklich, glaubt man auch, dass er klar denkt
English (LSJ)
in orat. recta,
A for not, in assigning a negative reason, Il. 22.438, etc.: other Particles are sometimes put between, as οὐ μὲν γάρ 5.402; οὐ γάρ, in assent to a neg., no indeed, Pl. Tht.150a, etc.
II elliptic, in interrog. replies, where yes or well must be supplied, τούτους ἀγαθοὺς ἐνόμισας;—οὐ γάρ…; yes (or well), and aren't they? Ar. Pax970.
2 in questions, where an affirm. answer is expected, οὐ γὰρ ὁ Παφλαγὼν ἀπέκρυπτε ταύτας;did not he keep them hidden? Id.Eq.1392, cf. D.22.73, etc.