Your reality is not determined by the representation that you inhabit but by the world in which you act and interact. So then in a dream your world is the dream-world and your self is the dream-self as it arises from your dreaming experiences and engagements. If this were like the putative simulation, where now it is your brain that is doing the work of the computer housing the simulation, then your awareness would be only a dream-awareness. But isn't it in the nature of the dream that the awareness is not a mere thought or representation of 'an' awareness but your very awareness such as it is in every experience waking or sleeping. This is why lucid dreams are possible and why you can have insights into the nature of pure subjectivity in dreams whose aura of well-being and satisfaction persists for a good while after waking up, being only lost through the usual process of discursive overwriting? The analogy with the simulation hypothesis breaks down here; the dream may be an encapsulated virtual world within a world, but the non-point of observation is unchanged, is neither a matter in dreaming world nor in the waking one. And what if every objective world is nothing more than an ideal construct, so that there cannot be a sharp ontological boundary between the worlds inside or outside of a simulation? The problem is in the weight accorded to objectivity, the projection onto this concept of the sense of ground which you cannot yet accommodate in its only possible site in pure awareness. What lives you is your own incredulity.