In support of this objection, let us consider a gender egalitarian ethos that condemns women having to do more housework than men, for no good reason. As with Cohen’s egalitarian ethos, this ethos may fail to provide a public standard by which to justify and to criticize our own and others’ sexist behaviour. This is because, in order to determine whether a husband who refuses to do the washing up because of backache is acting in accordance with the demands of the gender egalitarian ethos, we would need to know how severe his backache is, as well as to compare the other domestic burdens that he has borne with those that his wife bears. This makes the gender egalitarian ethos highly epistemically demanding, such that it may fail the tests of determinacy, accessibility, and/or verifiable compliance (Cohen 2008: 359–60). However, it is intuitively implausible to reject the gender egalitarian ethos on this basis. Rather, in this case, justice requires “good-faith efforts, not omniscience” (Casal 2015: 822).[69]