Not the failed and discredited appeal to the 30,000 denominations argument. Whatever credibility you may have had just went out the door.
It’s easy enough to claim to have discredited something.
I will continue to pray for our separated brethren. I hope all of you will pray for us Catholics. We all spend way too much time on these threads attacking each other, and not exhibiting much Christian Charity. Maybe we should move on to more fruitful pursuits.