  The defender of the Cohen side of this debate will insist that reasonable people can make mistakes, so the fact, if it is a fact, that any particular view of the positive duties to promote justice and equality in daily life that we should accept will fail to gain unanimous support does not necessarily impugn the particular view. Some such view may be correct though controversial. Also, the egalitarian ethos with its demands on individual daily conduct is not supposed to be legally enforceable, rather it is supposed to be a social norm backed by informal sanctions and rational persuasion. Still, justice demands an egalitarian ethos, and individual conduct in conformity with it. So the defender of the Cohen position will hold. This is a tricky issue. It may be difficult to determine to what extent Cohenites and Rawlsians are in substantial disagreement, as opposed to arguing past each other. It may be still more difficult to determine which side (if either one) is right on the points that substantially divide them.