but none of the measures of it which we make use of can be KNOWN to do so, nor can we be assured that their assigned parts or periods are equal in duration one to another; for two successive lengths of duration, however measured, can never be demonstrated to be equal.
baina guk ez dakigu ziurtasunez erabiltzen ditugun neurrietako bat ere iraupena bezala ari den eta esleituriko zatiak edo aldiak euren artean berdinak diren ala ez, inoiz ez baita frogatu segidako iraupen luzera bi, nolanahi neurtuta, berdinak direnik.