tathā hi tvadupavarṇitayaivopapattyā viparīto 'pyutsargāpavādaḥ śakyate kalpayitum iti darśayati anayaivetyādi
Thus, by the very same reasoning that you have described, even the opposite [position regarding] general rule and exception can be established, as [the author] shows beginning with "by this very [reasoning]."