In Bernard Gert's 'Morality', now in its sixth edition, he argues that morality is an informal system that does not provide answers to every moral question but ... » 

In Bernard Gert's 'Morality', now in its sixth edition, he argues that morality is an informal system that does not provide answers to every moral question but does always limit the range of morally acceptable options and so explains why some moral questions cannot be resolved. He also shows the complex role that reasoning plays in moral decisions. «