ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
ĕpĭchīrēma: ătis, n., = ἐπιχείρημα, rhet. t. t.,I a kind of argument or syllogism, Quint. 5, 10, 2 sq.; 5, 14, 5 al.