yathābhihitasya dvīndriyagrāhyadharmiṇo 'siddheḥ kāraṇādāśrayaikadeśāsiddhyā hetor asiddhiḥ //59- [p.47]
"Because the subject as stated, [namely that which is] perceptible by two sense organs, is unproven, the reason is unproven due to the unprovenness of one part of its substratum."