tathā hi catvāraḥ pakṣāḥ sambhavanti kadācid ubhe 'pi prāmāṇyāprāmāṇye svata eveti prathamaḥ, kadācid aparata eveti dvitīyaḥ, prāmāṇyaṃ parato 'prāmāṇyaṃ tu svata eveti tṛtīyaḥ, etad viparyayaścaturthaḥ /
Thus four positions are possible: first, that sometimes both validity and invalidity are intrinsic; second, that sometimes both are extrinsic; third, that validity is extrinsic while invalidity is intrinsic; and fourth, the reverse of this.