Luke 20:5

συνελογίσαντο πρὸς ἑαυτούς. The aorist implies that they at once went aside to discuss together what answer they should give. This deliberation rendered their confession of ignorance more glaring and more fatal to their claims. ἑαυτούς, themselves, should in logical strictness be ἀλλήλους, one another; but, in most languages, reciprocity is often thus colloquially extended into identity.

οὐκ ἐπιστεύσατε. See Luke 7:30. It never occurred to them to speak with the courage of their convictions.