Normally, I find that people who don't say sorry are of an aggressive nature, sadly there are many. Then you have the ones that say sorry a lot, even if its not their fault, this I believe is a way of avoiding conflict with, who may be aggressive. The you have such as AB were one as given an opinion on a subject, been proven wrong, but can't accept their wrong, and thus keep plodding on with their wrong opinion. My case rests, if you think I'm wrong, sorry. :0)