 This third conception of value incommensurability is sometimes said to be necessary to explain why, in conflicts of value, a gain in one value does not always cancel the loss in another value. This view assumes that, whenever there is a true ranking between the realization of one value and the realization of another value, the gain in one of the values cancels the loss in the other. Many commentators question that assumption. This entry leaves open the possibility that when there is a true ranking between the realization of one value and the realization of another value, the gain in one of the two values need not cancel the loss in the other.