I\'ve never known anyone that is honestly this dense!
There are many words for what he is doing, but I can assure you that \"dense\" isn\'t one of them. He is perfectly aware that he has been caught in a ridiculous sham, but I think he also knows that apologizing will accomplish nothing at this point either. He\'s way, WAY beyond the point where apologizing would help. So he\'s decided to go the defiant route.
I\'ve seen it before. Many, many years ago, in the early days of the Usenet groups, there was a guy (FAR smarter than LGY, by the way) who loved to beef up his arguments and just cause general mayhem by creating lots of different identities that would agree with him on line. (Interestingly, he just got back in touch with me after many years away, and sure enough he used a fake account to do it.) Even back then it was very easy to expose that sort of thing, but just like in this case, if you\'re brazen enough to do something that ridiculous. you\'re also brazen enough not to admit it even when exposed. So he\'d spout doubletalk and gobbledygook rather than admit the obvious truth. That\'s all that\'s happening here.