Madhvaon Brahma Sūtra 2.2.28

And it cannot be said that as the creatures of a dream, etc., (are), the world too, though an object of perception, is non-entity ; for, unlike the world, the creations of a dream, etc., are objects of a widely different perception thus : * This is a mere dream, this is not the serpent ’ and so on. And there is no such authority here (as would prove non-existence of the world). In this Adhikarana, the Sutrakara refutes the theory that all things are mere modes of Vignana.