 Later Mohists formulated a more “realistic” theory of what counts as the normatively correct way to use names. We should mark the distinctions that underlie names in ways that trace patterns of objective similarity and difference in things. This realism governs the correct ways both to use terms and to interpret them. We rely on utility to determine how we structure terms into strings in guidance—in discourse dao . So, for example, a thief is a man—is governed by the rules of similarity. Still, we allow guidance that includes both the guiding strings “don’t kill men” and “you may kill thieves.” 