Moral facts deniers claimed that moral elements cannot be facts which can be verified and justified as facts by science.
But what the realists claimed as fact, i.e. scientific facts within scientific realism are false, thus they do not have the credibility to refute facts that are moral related.
Here is an interesting argument re The Pessimistic Induction that counter the realists' view, i.e.,
All Current Scientific Theories are False.
https://plato.stanford.edu/entries/scie ... /#PessIndu
There are defenses to the above.1. If one considers the history of scientific theories in any given discipline, what one typically finds is a regular turnover of older theories in favor of newer ones, as scientific knowledge develops.
2. From the point of view of the present, most past theories must be considered false; indeed, this will be true from the point of view of most times.
3. Therefore, by enumerative induction (that is, generalizing from these cases), surely theories at any given time will ultimately be replaced and regarded as false from some future perspective.
4. Thus, current [scientific] theories are also false.
Nevertheless with the above reservations, we cannot insist that science is moving closer and closer to the real-Truth, i.e. a mind-independent reality as claimed by philosophical realist.
P-realists claim there is a mind-independent [independent of human conditions] reality and things regardless whether there are humans or not.
I challenge those who insist there is a reality that is uncorrelated [generally claimed as mind-independent] of the human conditions, to prove their positive claim.
Discuss?? Views?