With the development of Artificial Intelligence( AI),there are a lot of legal challenges,and theorists have to response to them. However,absence of sufficient understanding of AI,those debates will be wrong,such as about "Algorithms is Law",or be trivial,such as AI adjudication and current legal policies. If theorists recognize that AI has two distinctions,it can instrumentalize human being and challenge the understanding of the nature of "Reason",and we will figure out the right answer to it.