The earliest editions have deducible to. Scott has altered this to 'reducible to.' The word reducible is not applicable here (see its use on p. 142, 1. 2); and although the preposition from is more correct and more in accordance with modern usage, I am by no means certain that Swift may not have written ' to.' Irregularities of this kind are quite consistent with his style. 'Deduce' on 1. 24 of the next page has no sense of tracing by deduction, but merely means to trace in detail.