Well, in the real world the same user meets a lot of similar dilemmas, like acquainting himself with people with the same name or encountering cars of the same

Well, in the real world the same user meets a lot of similar dilemmas, like acquainting himself with people with the same name or encountering cars of the same model and color (and what happens then is that one starts to pay more attention to distinctions). Why does it have to be any simpler for data labels? Does that poor user have to be necessarily guarded to such a degree from the reality itself?