Most importantly, rule-consequentialist assessment of codes needs to avoid giving weight directly or indirectly to moral ideas that have their source in other moral theories but not in rule-consequentialism itself. Suppose people in a given society were brought up to believe that women should be subservient to men. Should rule-consequentialist evaluation of a proposed non-sexist code have to count the costs of getting people to give up the sexist rules they have already internalised so as to accept the new non-sexist ones? Since the sexist rules are unjustifiable, that they were accepted should not be allowed to infect rule-consequentialist assessment.