this is a serious question.
how do psychologists tell if an individual has asperger's syndrome or not? according to some diagnositc criteria like DSM-IV, only repititve behaviour is required for diagnosis aside from social impairment. the lack of other requirements makes it possible for a person without the syndrome to be wrongly diagnosed as having it, because the crieria is not speicific. ( for example it may appear that X has aspergers on the surface, but in fact he is just socially awkward and shy. the presence of repititve behaviour, based on subjective judgement, might just be a coincidence.)