atha vastuvirahalakṣaṇameva nīrūpaṃ dharmiṇaṃ pakṣīkṛtya nairūpyāditi hetuḥkriyate tadā siddhasādhyatā /
If the reason "because of formlessness" is put forward taking as the subject the formless substrate characterized by the absence of the thing, then [this results in] proving what is [already] proven.