I was thinking some.. you mentioned you thought he was mostly in denial and that you thought he might understand some? I know sometimes children at that age will start the argument for attention but I know sometimes even with adults an argument is used for venting anger, frustration, fear, all kinds of feelings they are for whatever reason unable to express in other ways. Could it be possible that in the back of his mind he sort of understands and uses fights to argue with everyone to try and convince himself it isn't true? I would think this more possible from an adult.. but you never know. If you just didn't argue with him.. or talk with him when he was having a fight it might change the outbursts he uses to cope with it maybe. Just an idea! I know seeing kids so upset is awfull and it being over such a personal issue must make it harder on all of you.