I've been around here for quite some time. I've gone back and forth with JD many times and he is without a doubt one of the most hard-headed people that I've encountered on here. Hell, he will even tell you about other people that he has no clue about, but somehow he thinks he knows more about them than they do themselves. He will make up a lie about someone in a heartbeat! He's done it to me as well as others on here. When he can't make an argument he'll start making up crap. If you don't think that, then you have not been around here long enough to see it.
Look back over some of the arguments that have happened with him and others. Check out the pattern that he has when he is proven wrong. He will never acknowledge that the other one is correct. He just won't respond. Pretty lame of him. I'm not the only one on here that knows this of him either.
Now, I did say never, but there were a couple of times (out of many) that he did acknowledge he was wrong.
