In this paper, I argue that the good is irreducible. I use the term ‘irreducible’ in a way similar to but not identical to G. E. Moore’s usage of ‘indefinable’ as found in Principia Ethica. By ‘irreducible,’ I mean that something cannot be simplified into something other than itself. For my purposes, this is to say that the good is sui generis and cannot be accounted for by anything other than itself. Inspired by what I take to be Moore’s basic insight, I develop my own argument pertaining to the uniqueness of the good. My argument goes partially beyond intuition, and hence beyond Moore, by means of applied intuitions (counterexamples). In the penultimate section, I apply the Discordancy Argument to Aristotle’s ethics, arguing that it is an attestation to the general virtue thesis that what is good does not admit of a reducible deduction. Broadly speaking, I consider the Discordancy Argument and general ethical intuitionism as justification for the Aristotelian idea that good actions are found in concrete particulars and not reducible abstractions, hinting at Aristotle’s affinity for ethical intuitionism. Furthermore, a recent debate surrounding moral ontology (per William Lane Craig and dissenters) is deemed obsolete.
