Every time you explain yourself to someone who’s decided not to understand, you lose a little leverage.

Some people are not confused, they are committed. Explaining again to someone in that position does not move them, it just shows how much you need their agreement, and that need is the thing they were testing for. Each extra round makes your position sound less settled, even when nothing about it has changed.

Say it once, clearly, and then let the silence do its job. If they come back genuinely asking, answer. If they come back with the same objection in new words, you have your answer, and you can spend that energy on someone who was actually listening.