and if it seems to be produced by several means they consider by which it is most easily and best produced, while if it is achieved by one only they consider how it will be achieved by this and by what means this will be achieved, till they come to the first cause, which in the order of discovery is last.
eta agerian baldin badago baliabide askoren bidez lor daitekeela, zeren bidez lor daitekeen errazago eta ederkiago ikertzen dute, eta baliabide bakar baten bidez erdietsi badaiteke, horren bidez nola lortuko den eta, era berean, azken hori zeren bidez, kausa leheneraino iritsi arte, aurkitzen den azkena dena.