But their idea of an absolute mind-independence of facts faced a lot of challenges and it ultimately flawed, illusory and not factual.
As such, moral relativists (philosophical realists) has no credibility and grounds to refute the existence of objective moral facts.
Here are the critiques against Metaphysical Realism [a form of Philosophical Realism].
Metaphysical Realism is the thesis that the objects, properties and relations the world contains, collectively: the structure of the world [Sider 2011], exists independently of our thoughts about it or our perceptions of it.
Anti-Realists either doubt or deny the existence of the structure the metaphysical realist believes in or else doubt or deny its independence from our conceptions of it.
- 3. The Anti-Realist Challenges to Metaphysical Realism
3.1 Language Use and Understanding
3.2 Language Acquisition
3.3 Radical Skepticism
3.4 Models and Reality
3.5 Conceptual Schemes and Pluralism
https://plato.stanford.edu/entries/real ... challenge/
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