Moral realism is the philosophical view that there are objective moral facts and values that exist independently of human beliefs or perceptions. It posits that moral statements can be true or false based on these objective standards, similar to factual claims about the physical world.
Moral discourse refers to the communicative practices through which individuals and societies negotiate, express, and contest moral values and ethical principles. It is crucial in shaping collective norms and guiding behavior by providing a platform for reflection and dialogue on moral issues.
Moral non-cognitivism is the meta-ethical view that moral statements do not express propositions or truths but rather emotional attitudes or prescriptions. It challenges the notion that moral discourse is about stating facts, suggesting instead that it functions to express feelings or commands.