tataś cāprāmāṇyam api svata eva sāmarthyādāpatitam, visaṃvādakāraṇadoṣaparijñānānapekṣaṇāt, prāmāṇyaniścayānutpatter ivāprāmāṇyasya niścitatvāt
Therefore invalidity too follows by implication as inherent, without depending on knowledge of defects in causes leading to non-conformity, since invalidity is determined just from the non-arising of certainty about validity