πρόσκοπος
From LSJ
μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides
English (LSJ)
ον,
A foreseeing, sagacious, σύνεσις Pi.Fr.231 (for A.Eu. 105, v. ἀπρόσκοπος). II as Subst., outpost, vedette, X.Lac.12.6: pl., reconnoitring party, Id.Cyr.5.2.6, D.C.40.10, etc.