Consciousness is often said to disappear in deep, dreamless sleep. We argue that this assumption is oversimplified. Unless dreamless sleep is defined as unconscious from the outset there are good empirical and theoretical reasons for saying that a range of different types of sleep experience, some of which are distinct from dreaming, can occur in all stages of sleep.
What surprises me, is you wouldn't accept the relative/changing definition as a valid definition itself.
Guess that could be an interesting conversation, potentially shedding some light on different worldviews... but I don't really know where to begin. Curious.
