Teaching requires empathy. A small application of empathy should tell you that no one in your audience will take your word for granted on this. This lack of trust could be very easily remedied with a single example: "cannot be dismissed as easily as you believe, because of some refuting point that wasn't brought up in any of the previous discussions, as you will also see wasn't brought up in any previous discussions".

I honestly don't see any valid reason to wait for a debate with komponisto in particular to provide this sort of evidence, either; which makes it sound suspiciously like an excuse for delay.