Abstract

The incommensurability of values thesis is widely regarded as an effective and highly detrimental line of criticism against utilitarianism. The article begins by providing some general background about the development of the incommensurability thesis, as used both in mathematics, in the philosophy of science, and, most importantly, in moral and political philosophy. It then moves on to clarify the alleged importance of the incommensurability of values argument as an objection to utilitarianism and to distinguish two different meanings of that argument . The main part of the article provides an analysis of these two alternative meanings. Incomparability1 , though perfectly valid, is shown to be misguided as a criticism of utilitarianism. Incomparability2 is shown not to pose any real difficulty to utilitarianism by demonstrating that incomparability of that kind is, as a matter of fact, indistinguishable from the notion of rough equality and that, accordingly, indifference towards the choice between the incomparable2 competing options is justified