What does your soul do, when your physical brain is sleeping?
Describe what it is like to exist in a place where time does not exist.
Does it travel to another dimension, where it has another life? Oh dear, that sounds like spiritualism (or maybe aborigine 'dream time' etc.). Not sure many good catholics would like that.
Trouble is, Alan's arguments essentially derive from his sense of subjective perception. Well, arguments for the night-time travelling of the 'astral body' also derive from subjective perception.
I'm sure many of us (certainly myself) have had other-worldly experiences which seem utterly real and convincing at the time they were experienced - 'lucid dreaming' etc.
The fact that they seemed real does not make them real.
This world could of course be the dream, and the dream-time experiences be the real ones.....