The reason whereof is, that the lowest species being but one simple idea, nothing can be left out of it, that so the difference being taken away, it may agree with some other thing in one idea common to them both; which, having one name, is the genus of the other two:
Azken espezieari, izan ere, ideia bakun bat baino ez delarik, ezin zaio ezer kendu, eta era horretan ezin du, aldea kenduta, beste gauza batekin ideia komun batean, bien generoa deritzanean, ados etorri;