ἀψεύδεια
From LSJ
Βέβαιον οὐδέν ἐστιν ἐν θνητῷ βίῳ → Nihil, ut videtur, proprium in vita datur → Nichts Festes gibt's im Leben eines Sterblichen
English (LSJ)
ἡ,
A truthfulness, Corinn.Supp.2.70, Pl.R.485c, Iamb. Protr.20; reliability, of times and seasons, Arist.Mu.397a11: ἀψευδία, Ph. Fr.110H., Them.Or.21.257c.