ὑπὸ δὲ τῆς φιλαυτίας παρηγμένοι ἄλογα φασὶν τὰ ζῷα ἐφεξῆς τὰ ἄλλα σύμπαντα → it is self-love which leads them to say that all the other animals without exception are non-rational
P. and V. εὐήθως, Ar. and P. ἀνοήτως, P. μώρως (Xen.); see foolishly.
ridiculously: P. ἀτόπως, γελοίως, καταγελάστως.