The Mithyātva (perverse faith) of an Amanaska Jīva (living being devoid of mental faculty) or a thoughtless person, on account of its or his Ajñāna (ignorance).
anābhogikaṃ vicāraśūnyasyaikendriyādervā viśeṣavijñānavikalasya bhavati.
(Yośā 2.3 Vṛ Pa 165)