εἰ μὴ ἦλθον καὶ ἐλάλησα αὐτοῖς, ἁμαρτίαν οὐκ εἶχον → if I had not come and spoken to them, they would not be guilty of sin
ἡμιθῆτα, τὸ (Α)μισό θήτα, είδος μουσικού σημείου.