Disclaimer: This is way outside of my wheelhouse. So the chances that this is just misguided are great. But it’s my month to post and I’m answering the editor’s (Half-Assed) Plea for Half-Assedness.
Many moral skeptics appeal to the following metaphysical thesis in supporting their view:
- Metaphysical Naturalism (NAT) – There are only natural properties.
And ethical non-naturalists are committed to the following metaphysical thesis:
- Metaphysical Plurality Thesis (PLU) – In addition to natural properties, there are non-natural properties.
Now, many think that NAT is more plausible than PLU on the grounds of parsimony. I think that this is a mistake.