The theory of incommensurability presents us with the view that when forced to decide between different options, we may lack the ability to objectively compare the values underlying each alternative. Though our ultimate decision may be grounded in a variety of reasons, the fact of our decision is not proof in itself that the values behind our choice are better than those that we left behind. Some principles may rise above others, according to incommensurabilists, but that means only that they have won the battle in praxis, not in ethics. The impossibility of comparison may exist in some cases, but …

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USA Decides 2016