 The conclusion of this argument clearly follows from its premises, so the question facing those who wish to defend at least the existence dimension of realism in the case of morals is whether the premises are true. (Note that strictly speaking what the argument purports to establish is that there are no moral facts as-we-conceive-of-them. Thus, it may be possible to block the argument by advocating a revisionary approach to our moral concepts; or by deploying a Ramsey-Carnap-Lewis conception of theoretical terms and arguing that there are moral facts, just ones that do not answer to our concept but which (coming closer than other candidates) would best deserve the “moral fact” label (see Smith 1994), section 2.10 for a good explanation of the application of the Ramsey-Lewis-Carnap conception in the moral case).