certainly, to be sure, of course:
1.in answers, added to a word which echoes the question, ἴσασιν; do they know? Answ. ἴσασι δῆτα aye they know, Eur.; often with a negat., οὐ δῆτ᾽ ἔγωγε faith not I, Ar.
2.in questions, mostly to mark an inference or consequence, τί δῆτα; what then? πῶς δῆτα; ἆρα δῆτα, etc. Trag.:— sometimes it expresses indignation, καὶ δῆτ᾽ ἐτόλμας; and so thou hast dared? Soph.; ταῦτα δῆτ᾽ ἀνασχετά; id=Soph.; ironical, τῶι σῶι δικαίωι δῆτ᾽; your principle of justice forsooth, id=Soph.