KnowraIs–ought problemLinked fromLinked fromThe 7 pages that link to Is–ought problem, each with the reason it gives.All 7Related 7Moral relativismRelated: Describing cultural norms alone does not establish that those norms are morally valid.Hans KelsenRelated: Kelsen’s separation of legal norms from social facts draws on the distinction between ‘is’ and ‘ought.’Secular ethicsRelated: It raises a problem for grounding moral duties in facts about human welfare.Rational egoismRelated: It challenges arguments that move from facts about rational agency directly to duties of self-interest.EgoismRelated: Psychological facts about selfish motives alone do not establish ethical egoism.Appeal to natureRelated: The appeal moves from a claim about naturalness to a value judgment without supplying a normative premise.Secular moralityRelated: It tests whether facts about human needs alone can support moral obligations.