From what I'm aware, multiple-personalities generally arise from a mental trauma occuring (usually) during childhood, where someone mentally escapes a situation by creating other 'people' inside of them who they can 'escape to' for comfort and to help them pretend they are somewhere else/living a different life etc.
That seems quite different from someone performing advanced sleep-activities, especially when the sleeping person is performing a task which closely resembles their dream (as in the cooking woman).
It's like if you see consciousness as a signal travelling down a cable, multiple-personality would equate to that signal hitting a switch and being diverted to a different cable altogether, going a different direction. Whereas the sleeping "bi-consciousness" would resemble the signal hitting a splitter, splitting it into two cables running
parallel to eachother simultaneously. And as with a split signal, where each one is weaker than it was before it split, the two "consciousnesses" of the split person would both be less than complete; the dream one is in that weird, fuzzy 'dream-state', and the one actually performing the task is operating without any real sense of awareness at all.
I wish I could experience something like this! What would be
truly incredible would be if someone dreamed about going to a bowling alley and bowling a game while in
reality sitting down at the sewing machine and sewing a dress. THAT would be impressive.
Or dreaming about golfing while actually playing a game of darts.
I just had a really funny thought about a guy having a long, elaborate dream about being a black slave in the 1850's, plowing a field in the hot sun all day.....then waking up in their living room at 3:30 in the morning, slumped against their couch with a massive mess in front of them, having just eaten 7 bowls of oatmeal with cream cheese smeared on their face.....hahaha!!
If I ever make a movie, this will definitely be a scene.
