Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Laws are styled similar when nothing can be opposed to one except the other.
Tyrannicides shall have their statues set up in the gymnasium. A statue of a woman shall not be set up in the gymnasium. A woman killed a tyrant.Here are two conflicting laws: for a woman's statue cannot under any other circumstances be erected in the gymnasium, while there is no other circumstance which can bar the erection of the statue of a tyrannicide in the gymnasium.
Laws are styled dissimilar when many arguments can be urged against one, while the only point which can be urged against the other is the actual subject of dispute. An example is provided by the case in which a brave man demands the pardon of a deserter as his reward. For there are many arguments, as I have shown above, which can be urged against the law permitting a hero to choose whatever reward he will, but the letter of the law dealing with the crime of desertion cannot be overthrown under any