In this paper, the problem of illusory perception, as approached by the Nyāya and Advaita Vedānta schools of philosophy, is discussed from the standpoint of the Parimala. This seminal work belonging to the Bhāmatī tradition of Advaita Vedānta was composed in the sixteenth century by the polymath Appaya Dīkṣita. In the context of discussing various theories of illusion, Dīkṣita dwells upon the Nyāya theory of anyathākhyāti, and its connection with jñānalakṣaṇapratyāsatti as a causal factor for perception, and closely examines (...) if such an extraordinary (alaukika) perception is tenable to explain illusory perception. He then proceeds to point out the deficiencies of this model and thereby brings to the fore the anirvacanīyakhyāti of Advaitins as the only theory which stands scrutiny. (shrink)