How so? Either your stomach reminds you that you are hungry and need to eat (or die) or You mind makes you think that your stomach reminds you that you are hungry and need to eat (or die) Proves nothing. Sort of like, if you die in VR you die in real life, it doesnt make the cause of your death (say a VR Vampire) more real in any objective sense, but the effects would be the same because your brain is fooled into thinking that it does exist objectively. Hunger proves nothing about the nature of reality, only that whatever it's nature you are subject to it..