Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.at least then, freq. scarcely distinguishable from simple γε: twice in Hom. (with a second γε added), “εἴ γ᾽ οὖν ἕτερός γε φύγῃσιν” Il.5.258; “μὴ ἐμέ γ᾽ οὖν οὗτός γε” 16.30 (so “ἔοικα γοῦν τούτου γε . . σοφώτερος εἶναι” Pl.Ap.21d); freq. later, “δοκέων πάγχυ δευτερεῖα γῶν οἴσεσθαι” Hdt.1.31; “γνώσει . . ὀψὲ γοῦν τὸ σωφρονεῖν” A. Ag.1425, cf. 432 (lyr.), etc.; freq. in adducing an instance, or a fact giving rise to a presumption, Heraclit.58, Th.1.2, X.Cyr.1.5.8; τὸν γοῦν ἄλλον χρόνον in past time at all events, D.20.16; emphasizing a personal or possessive pronoun, “τὸ γ. ἐμόν” S.OT626, cf. Ant.45; introducing an apodosis, Pl.Alc.1.112b; simply emphatic, why yes, E.Ph.618, Pl.Sph.219d, etc.; each Particle has its full force in τὰς γοῦν Ἀθήνας οἶδα well (οὖν), I know Athens (γε), S.OC24:—freq. separated by a word, “πάνυ γ᾽ ἂν οὖν” Ar.Ec.806, cf. Th.1.76, etc.:— rarely γε οὖν in full, D.H.2.56 codd. (The negat. form is οὔκουν . . γε.）