  Tolhurst thus ultimately reaches the verdict that his argument is inconclusive, and there are additional ways to question it besides that which invokes the idea of a special cognitive ability. For example, his two principles can be challenged with reference to the “permissivist” view that the same set of evidence can license different doxastic attitudes toward a proposition (see, e.g., White 2005 about permissivism). However, Tolhurst also makes some remarks about how to move forward which are of general interest. The upshot of those remarks is that the argument he developed should be assessed from a holistic perspective. The legitimacy of invoking a specifically moral cognitive ability depends, he thinks, on “whether a realist theory which includes [that] hypothesis can, as a whole, explain moral [and non-moral] phenomena more effectively than its antirealist rivals” (621). This is an important observation in view of that arguments from moral disagreement are often assessed under the assumption that they are expected to establish their skeptical or antirealist conclusions all by themselves and are dismissed if it is found that they fail to do so. What the holistic approach suggests, however, is that, even if they fail in that sense, it is still conceivable that they might contribute to a successful combined challenge, by joining forces with other skeptical or antirealist arguments, such as the evolutionary debunking ones. (The evolutionary debunking strategy is described and discussed in FitzPatrick 2021. For an attempt to combine it with arguments from disagreement, see Tersman 2017, but see also Klenk 2018 for a critique.)