Abstract

This paper is a revised version of the Royal Institute of Philosophy’s Annual Lecture, 2016. It discusses the demands of critical reasoning in ethical arguments, and focuses in particular on the assessment of justice. It disputes the belief that reasoning about choice remains unfinished until an optimal alternative has been identified. A successful closure of a reasoning may identify a maximal alternative, which is not judged to be worse than any other available option. A maximal alternative need not be optimal in the sense of being ‘best’. Critically sound reasoning can lead us to a partial ordering yielding a maximal alternative that is not optimal. The compulsive search for an optimal alternative needlessly limits the reach of reasoning in ethics.