ἀπογνωστέον
From LSJ
πῶς δ' οὐκ ἀρίστη; τίς δ' ἐναντιώσεται; τί χρὴ γενέσθαι τὴν ὑπερβεβλημένην γυναῖκα; (Euripides' Alcestis 152-54) → How is she not noblest? Who will deny it? What must a woman have become to surpass her?
English (LSJ)
A one must give up in despair, ἐλπίδας Ph.1.455, cf. Aristaenet.1.17. 2 one mustreject the view, Plot.4.9.2: c.gen.,Simp.in Ph.610.9.
Greek (Liddell-Scott)
ἀπογνωστέον: ῥηματ. ἐπίθ. τοῦ ἀπογιγνώσκω, δεῖ ἀπογιγνώσκειν, οὐκ ἀπογνωστέον τοῦ κοινοὺς ἅπασι νόμους γενέσθαι Συνέσ. 154C.