tathā ca abhāva vijñānam na abhāveṣu virudhyate / dhvaniḥ vā anugataḥ anartha saṅketa anugamāt tayoḥ // 
Thus the notion of negation with regard to negation is not incompatible; nor is the comprehensive name (incompatible); because they proceed from convention, which does not involve the assumption of any other entity 