Original sentence: " See also Objectivist Metaethics.Another attack on Rand comes from her outright rejection of David Hume's ideas at the foundations of her philosophy.Hume famously maintained, "No is implies an ought," but Rand wrote it off by arguing that values are a species of fact (see is-ought problem).She wrote, "In answer to those philosophers who claim that no relation can be established between ultimate ends or values and the facts of reality, let me stress that the fact that living entities exist and function necessitates the existence of values and of an ultimate value which for any given living entity is its own life.The fact that a living entity is, determines what it ought to do.Thus the validation of value judgments is to be achieved by reference to the facts of reality
Edited sentence: Hume famously maintained, "No is implies an ought," but Rand nonetheless used a fact from reality (the tendency of living things to survive) to justify an ethical justification for this.The most rigorous attack on Rand comes from her outright rejection of David Hume's ideas at the foundations of her philosophy.While Rand was aware of Hume's dictum, she wrote it off by arguing that values are a species of fact (see is-ought problem)