Let there be a series, in which is given as conditioned in respect of, but at the same time as the condition of and the series ascends from the conditioned to (/,j, etc.); then I must presuppose the first series in order to regard as given, and is possible in accordance with reason (with the totality of conditions) only by means of that series; but its possibility does not rest on the subsequent series , which therefore cannot be regarded as given, but only as dabilis.