Deliberate perversity- A type of Mithyātva (perverse faith);
the world-view, on account of which, false metaphysical doctrine is adhered to deliberately by insistence on it.
ābhigrahikaṃ pākhaṇḍināṃ svasvaśāstraniyantritavivekālokānāṃ parapakṣapratikṣepadakṣāṇāṃ bhavati.
(Yośā 2.3 Vṛ p.164)