Some of the references are to show where we had that. Ess Amaleinu Eilu Habanim, and we go on to show where that happened. Some of the references are proof to the Drasha. Yado Netuya Zu Hacherev, then we bring proof that Netuya is for a Cherev, not showing when the Cherev happened.
The proof could be from a Malach and would work even from a human.