I'm not sure how denying moral realism stops someone from saying there are things which we should or should not do.
I agree that people who deny moral realism can't compare their moral views to those of other people using an external standard, but they can appeal to more general principles which they might share with those other people. For example, a vegetarian might argue with someone who's happy to eat meat but recognises that causing unnecessary suffering is bad, saying that eating meat is actually causing such suffering.
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timeasmymeasure
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Date: 2008-11-23 02:34 am (UTC)I agree that people who deny moral realism can't compare their moral views to those of other people using an external standard, but they can appeal to more general principles which they might share with those other people. For example, a vegetarian might argue with someone who's happy to eat meat but recognises that causing unnecessary suffering is bad, saying that eating meat is actually causing such suffering.