But we must not ignore the question whether we have to suppose one such substance or more than one, and if the latter, how many; we must also mention, regarding the opinions expressed by others, that they have said nothing about the number of the substances that can even be clearly stated.
Honelako substantzia bat ala bat baino gehiago-eta zenbat-ezarri 15) behar den ez da ahaztu beharreko kontua; aitzitik, gogoratu behar da besteen adierazpenek ez dutela ezer garbirik esan aniztasun horretaz.