Although the sufficientarian approach to distributive justice is increasingly popular in contemporary political philosophy, it is not easy to give an appropriate formulation of sufficientarianism. In this article, I aim to show that a proper formulation of sufficientarianism should satisfy three conditions: the Distinctiveness condition, the Intermediacy condition, and the Universality condition. However, I argue that it is very difficult to propose a substantial account of sufficiency that can satisfy the three conditions altogether. After examining several influential sufficientarian accounts, I (...) contend that none of them can satisfy the three conditions on sufficientarianism. (shrink)