 The moral argument from knowledge will not be convincing to anyone who is committed to any form of expressivism or other non-objective metaethical theory, and clearly many philosophers find such views attractive. And there will surely be many philosophers who will judge that if moral objectivism implies theism or requires theism to be plausible, this is a reductio of objectivist views. Furthermore, non-theistic moral philosophers, whether naturalists or non-naturalists, have stories to tell about how moral knowledge might be possible. Nevertheless, there are real questions about the plausibility of these stories, and thus, some of those convinced that moral realism is true may judge that moral knowledge provides some support for theistic belief.