I know 1+1=2 because I see the reality. I know it cannot equal 3 through observation and reasoning (logic that is properly basic).
So I ask you again, what makes you certain objective human value cannot exist in a materialistic world? In this case, you objectively would know something objectively about human value? Where does this knowledge come from? How do you know this? If you are sure about this property of objective human value, why aren't you sure about objective human value?
If you are only going to tackle the conclusion without addressing the argument, then we cannot get anywhere.
So I ask you again, what makes you certain objective human value cannot exist in a materialistic world? In this case, you objectively would know something objectively about human value? Where does this knowledge come from? How do you know this? If you are sure about this property of objective human value, why aren't you sure about objective human value?
If you are only going to tackle the conclusion without addressing the argument, then we cannot get anywhere.