"I’m forgetting something." was a giant blaring clue. Take this as an opportunity to learn the lesson of not calling someone a liar unless you are very very sure and have taken all the evidence into account.
whoah. I accused no one of lying. It is amazing how many people mix up this basic idea: Saying something that is incorrect is not the same as lying about it.
"that section wasn't in the article when I wrote that comment."
"It was there."
Everyone understands that such naysaying is effectively an accusation of lying. In any case it was a totally low effort utterly inappropriate comment. Clearly you aren't going to learn the lesson.