And as for the person who has written down what is just and unjust, fine and shameful, good and bad, or has laid down unwritten laws on these subjects, for all those herds of human beings that graze, city by city, according to the laws of those who wrote them down in each case if the person who wrote them on the basis of expertise, or someone else resembling him, arrives, is it really not to be permitted to him to give different instructions contrary to these?