 Mathematical concepts are impervious to bias, prejudice or otherwise-idiosyncratic definitions and their relative properties are clear to anyone who understands them perfectly. While many would contend that moral ideas are simply too controversial to fit a proto-mathematical picture, Locke would respond that they seem controversial only because many of us have not taken the time to consider moral ideas in an objective and analytical light. If we were to do so, he argues, we could come to know moral rules with certainty.