> what details should it have included so as not to be vague? - How is the correctness of such "law", expecially in context of UX desgin, is observed? - What

> what details should it have included so as not to be vague? - How is the correctness of such "law", expecially in context of UX desgin, is observed? - What are practical implications of these "laws", again in the context of UX design.