Well, I think this claim is more often made 'by omission'...you know, if you've known someone for, say, 10 years, on a daily basis, and they have NEVER (and I mean that literally) uttered the words "I'm sorry", "I was wrong", "Please forgive me" or any combination thereof towards you or anyone else, its pretty obvious that they have an infallibility complex (also demonstrated by excessive judgementalism...)
It is called narcisism, where a person does not see anyone else as anything but a cardboard cutout.
Other people are not real to them, we are all here for their specific enjoyment, and if we hurt them in any way shape or form, it is not because they might have done something wrong, it is because we are awful people, and just don't understand them.
They are perfect, and no one can tell them otherwise.
I have known a few sick freaks of this persuasion, a number of them have put a gun to their head and pulled the trigger.
No big loss as far as I am concerned.
Come on. Only 18 more to go!