Ca, Vim., 8, 52.1 athānuyogaḥ anuyogo nāma sa yat tadvidyānāṃ tadvidyaireva sārdhaṃ tantre tantraikadeśe vā praśnaḥ praśnaikadeśo vā jñānavijñānavacanaprativacanaparīkṣārtham ādiśyate /