not only must both be animals, but this very animality must also be different for each (e.g. in the one case equinity, in the other humanity), and so this common nature is specifically different for each from what it is for the other.
Izan ere, bietan baterako dutena eman ezezik (adibidez, biak animaliak izan), "animalia izatea" bera ere bestelakoa izan behar da haietako bakoitzean, adibidez, bata zaldia eta bestea, gizakia.