 It is worth noting that internalism is one expression of a more general viewpoint that emphasizes the action-guiding character of moral judgments. Though Harman and others (for example, Dreier 1990 and 2006) have argued that a form of moral relativism provides the best explanation of internalism, a more common argument has been that the action-guiding character of moral judgments is best explained by a non-cognitivist or expressivist account according to which moral judgments lack truth-value (at least beyond the claim of minimalism). In fact, some have claimed that the expressivist position avoids, and is superior to, moral relativism because it accounts for the action-guiding character of moral judgments without taking on the problems that moral relativism is thought to involve (for instance, see Blackburn 1998: ch. 9 and 1999, and Horgan and Timmons 2006). By contrast, others have maintained that positions such as non-cognitivism and expressivism are committed to a form of moral relativism (for example, see Bloomfield 2003, Foot 2002b, and Shafer-Landau 2003: ch 1). For an assessment of this debate, see Miller 2011, and for a discussion of non-cognitivism and related positions, see the entry on  moral cognitivism vs. non-cognitivism.