Here also the causes are known from the effects, consequently all natural philosophy rests upon hypotheses, which are often false, and must then gradually give place to more correct ones.
Hemen ere efektuetatik ezagutzen dira kausak: horregatik natur teoria guztia hipotesietan oinarritzen da, zeinak sarritan faltsuak izaten baitira eta gero pixkanaka leku egokiagoa hartzen baitute.