We can communicate the meaning of mathematical facts in ways you can’t communicate the meaning of irreducibly normative moral facts. The former are intelligible, the latter aren’t. So it’s not clear you can even present us with an intelligible set of propositions in the form of putative “moral facts” for us to entertain whether or not reason could allow us to discover them. “Discover what?” We can ask, and you won’t be able to intelligibly communicate what it is we’re supposedly discovering. The kind of moral realism you endorse isn’t merely false, it’s not even intelligible.
We can communicate the meaning of mathematical facts in ways you can’t communicate the meaning of irreducibly normative moral facts. The former are intelligible, the latter aren’t. So it’s not clear you can even present us with an intelligible set of propositions in the form of putative “moral facts” for us to entertain whether or not reason could allow us to discover them. “Discover what?” We can ask, and you won’t be able to intelligibly communicate what it is we’re supposedly discovering. The kind of moral realism you endorse isn’t merely false, it’s not even intelligible.
You and I have talked about this a lot before, so no need to rehash it.