For while there is a contrariety also between pale man and dark horse, and it is a contrariety in species, it does not depend on the paleness of the one and the darkness of the other, since even if both had been pale, yet they would have been other in species.
Izan ere, gizaki zuria eta zaldi beltza ere bereizi egiten 20) dira, hau espezieari dagokionez, baina ez bata zuria eta bestea beltza direlako, biak zuriak balira ere bereizi egingo lirateke-eta.