  Firstly, should rights be analysed solely in terms of duties on others (together with some other condition), or do we need to bring in also other concepts, such as permission, power and immunity? Hohfeld thought that, strictly speaking, something was a legal right only if it corresponded to a duty on another, but he argued that legal usage was often confusing because the reference was really to one of the other concepts. Thus, in his view, the law sometimes also said that X had a right if (1) he had a permission to A, (2) he had a legal power to A, (3) Y had no legal power to affect him.