> It is known that when the corpus callosum is severed during an experimental procedure, the experimenter can ask each side of the brain the same question and receive two different answers. When the experimenter asks the right visual field/left hemisphere what they see the participant will respond verbally, whereas if the experimenter asks the left visual field/right hemisphere what they see the participant will not be able to respond verbally but will pick up the appropriate object with their left hand.
So it's definitely possible to have two consciousness occupying the same brain.
> definitely possible to have two consciousness occupying the same brain
Based on the rest of your comment, I think that's quite a leap. The different parts of the brain are obviously not communicating normally with each other & the body, but I'm not sure that means two consciousnesses.
The most recent phenomenon to get this treatment was mindfulness. The problem is that it tends to be enthusiasts who are the first to explore something in a field, with predictable results.
It's hard to call this two consciousness occupying the same brain. It's more likely that brain is flexible enough that each half works independently, creating a consciousness in each of what are now two separate (half sized) brains.
It reminds me of https://en.wikipedia.org/wiki/Split-brain where after cutting the connection between the two hemispheres of the brain:
> It is known that when the corpus callosum is severed during an experimental procedure, the experimenter can ask each side of the brain the same question and receive two different answers. When the experimenter asks the right visual field/left hemisphere what they see the participant will respond verbally, whereas if the experimenter asks the left visual field/right hemisphere what they see the participant will not be able to respond verbally but will pick up the appropriate object with their left hand.
So it's definitely possible to have two consciousness occupying the same brain.