κοινὸν τύχη, γνώμη δὲ τῶν κεκτημένων → good luck is anyone's, judgment belongs only to those who possess it
διαβεβαιωτικῶς: утвердительно Sext.
aseverativamente
bestätigend, Sext.Emp. Pyrrh. 1.208, öfter.