I think MA is entitled to make a mistake without getting beaten up over it.
Not when you double down after your error has been pointed out to you. When I pointed out to him that we fast on 10 Teves when it falls out on Friday, he could have done any number of things:
He could have looked up the halacha himself to see if he is right or wrong
He could have asked someone if he is right or wrong
He could have spent five minutes using Google to see if he’s right or wrong
He could have said “Hmmm… you might be right, but I’d like to check further before conceding the point.”
However, instead of even considering the possibility that someone else might be right, he chose to instead to further insist on his correctness.
The Wolf