 if the sequence has a limit of the frequency, there must exist an n such that from there on the frequency \(f^{i} (i \gt n)\) will remain within the interval \(f^{n} \pm \delta\), where \(\delta\) is a quantity that we can choose as small as we like, but that, once chosen, is kept constant. Now if we posit that the frequency \(f^{i}\) will remain within the interval \(f^{n} \pm \delta\), and we correct this posit for greater n by the same rule, we must finally come to the correct result. (Reichenbach 1935 [1949: 445])