Bhagavad Gita -Sri Madhvacharya
(Bhashya and Tatparya Nirnaya)
It is not correct to accept that this world is made up of any special attributes as सत् and असत् - Existence and non-Existence; सत् being the Real and the असत् being the Appearance. Both the सत् and the असत् are subject to delusion. The असत् is spoken as such because it is perceived, not because it is experienced. If it be Appearance, then its knowledge is of no relevance, even when it is the un-manifest. असत् cannot be proved by another असत् If the सत् appears as असत् in delusion, it cannot be accepted as सत्. In common practice in any event, the असत् cannot cease to be. That which exists as its form also may appear as सत्. Same is the case with delusion. Even though it is indescribable, where silver appears as सत् such appearance cannot be treated as असत्, असत् only on the basis of its being delusion. Thus, the सत् which appears as असत् should also be accepted. Then, there would be no contradiction.