They reasoned with themselves (sunelogisanto). First aorist middle of sullogizomai, to bring together accounts, an old word, only here in the N.T. Mark and Matthew have dielogizonto (imperfect middle of dialogizomai, a kindred verb, to reckon between one another, confer). This form (dielogizonto) in Luk 20:14 below.
If we shall say (ean eipoĢmen). Third-class condition with second aorist active subjunctive. Suppose we say! So in Luk 20:6.