A Rawlsian Trick
In A Theory of Justice (Harvard University Press, 1971), the philosopher John Rawls proposed an account of justice that, in his view, was better than the competing theories, viz., utilitarianism, which says you should act by what will lead to the best consequences, and “deontological” theories that appealed to rights. Opponents of utilitarianism raised various problems for it, e.g., that applying it sometimes led to counterintuitive results.