 However, as can be seen from the Sorites paradox discussed in section 2.3, this recipe for the representation of preferences is too demanding for some purposes. If \(u(A)\gt u(B)\), but \(u(A)-u(B)\) is so small that it cannot be discerned, then \(A\succ B\) cannot be expected to hold. One way to represent this feature is to employ a cardinal utility function and to introduce a fixed limit of indiscernibility, such that \(A\succ B\) holds if and only if \(u(A)-u(B)\) is larger than that limit. Such a limit is commonly called a just noticeable difference (JND).