 Thus, although the evolutionary story fits naturally with a merely non-cognitivist metaethical view, it may fit equally well with a cognitivist view. If one rejects the existence of moral truths, the latter would then lead to an error theory (Mackie 1977). But as discussed in section 4.1, it is far from clear how much support evolutionary biology itself lends to moral anti-realism or irrealism. It is consistent with plausible evolutionary stories that although our capacities for normative guidance originally evolved for reasons that had nothing to do with moral truths as such, we now regularly employ them to deliberate about and to communicate moral truths. So all three metaethical views discussed here—expressivism, error theory and moral realism—remain on the table.