Down to the Italian school, then, and apart from it, philosophers have treated these subjects rather obscurely, except that, as we said, they have in fact used two kinds of cause, and one of these-the source of movement-some treat as one and others as two.
Italiarrak heldu arte, bada, eta hauek kontutan izan 10) gabe, gainerakoek oso modu ilunean hitz egin zuten kausa hauetaz, nahiz eta, esan dugun bezala, bi kausa erabiltzera iritsi ziren, zeren bigarren kausa, mugimenduaren sorburua dena, batzuek bat dela baieztatzen baitute eta beste batzuek, bi.