Objections have also been raised that, even if Mary's environment were constructed as described in the thought experiment, she would not, in fact, learn something new if she stepped out of her black and white room to see the color red. Daniel Dennett asserts that if she already truly knew "everything about color", that knowledge would necessarily include a deep understanding of why and how human neurology causes us to sense the "qualia" of color. Moreover, that knowledge would include the ability to functionally differentiate between red and other colors. Mary would therefore already know exactly what to expect of seeing red, before ever leaving the room. Dennett argues that functional knowledge is identical to the experience, with no ineffable 'qualia' left over. J. Christopher Maloney argues similarly: If, as the argument allows, Mary does understand all that there is to know regarding the physical nature of colour vision, she would be in a position to imagine what colour vision would be like. It would be like being in physical state Sk, and Mary knows all about such physical states. Of course, she herself has not been in Sk, but that is no bar to her knowing what it would be like to be in Sk. For she, unlike us, can describe the nomic relations between Sk and other states of chromatic vision...Give her a precise description in the notation of neurophysiology of a colour vision state, and she will very likely be able to imagine what such a state would be like. Surveying the literature on Jackson's argument, Nida-Rümelin identifies, however, that many simply doubt the claim that Mary would not gain new knowledge upon leaving the room, including physicalists who do not agree with Jackson's conclusions. Most cannot help but admit that "new information or knowledge comes her way after confinement," enough that this view "deserves to be described as the received physicalist view of the Knowledge Argument."