 As a result, vagueness raises an extraordinarily important set of problems for the philosophy of law. It may seem to be a different set of problems from those raised by vague language in general, because of three ways in which the legal use of vague language is distinctive. First, legal systems need to provide for authoritative resolution of disputes as to the effect of the use of vague language (where in some other domains of the use of language, we can get by without any such resolution).