Hello philosophers in a recent debate I was involved in a theist stated
“For morality to be objective, moral propositions such as "Killing is bad","Stealing is bad", etc... need to be true independently of the person who is stating them. “
“That is the way this position is normally put but a problem arises as in if there are objective moral facts how would we know this to be the fact? To know something is an objective moral fact only needs an agent to know this , how can a moral fact be known independent of a human mind to decide?”
Is my position logically sound or are there problems with my reply?
I think your counterargument is conflating issues that need to be kept distinct. Your interlocutor ((I'll call him or her your friend) said, correctly, that if morality is objective, the truth of moral claims doesn't depend on the person who makes them. That seems fine. To say that something is objectively true is to say that it's true whether or not anyone believes it. Your response was to ask how we could know that there are objective moral facts, if there really are. But that's a separate issue, and in fact it has nothing in particular to do with moral claims. If there are objective facts about what's going on now (say, in the Earth's frame of reference) in some remote part of the universe, then those facts are facts whether or not we could ever be in a position to know them. Whether X is mind-independently true and whether anyone is in a position to know that X is true are different matters. You ask: "how can a moral fact be known independent of a human mind to decide?" That's...