To put it in a simple way, if the left hemisphere is producing the lines a child draws in a picture, the right hemisphere is the set of crayons it uses to colour that picture in. Remember, the left hemisphere works in terms of this and that. Of stark lines and certainties. The right hemisphere works to project and generate quality, and specific contour.
Well, here we can go back to the main problem of the mind alone as a mating display — the mind itself is not particularly compelling, sexually or socially. It's not revolting, or repulsive, but it doesn't really generate any serious pull between people, as it would need to, were it a fully-evolved courtship display.
But then, if you look at what the right hemisphere does, which is to flesh things out with quality, emotion, contour and colour, could it be that the left hemisphere is using the abilities of the right to paint the fiction of mind in vivid, compelling colours?
Let me say that again. The left hemisphere produces the fiction of mind — but that's just a story about rational processes. Not particularly compelling..
It passes that structure over the corpus callosum to the right hemisphere, in the only terms it works in — absolute certainty. Think about that for a second — all of the fiction of rationality that the left hemisphere is producing include certainty as part of their nature. Certainty is just one of the qualities of left hemisphere thought.
It passes that fictional tale of rational thought over to the right hemisphere, in terms that are absolute and certain.
The right hemisphere just takes the information and does what it does, which is to flesh out the quality and unique contour of whatever it is presented with.
The right hemisphere doesn't challenge the certainty of the left — the right hemisphere doesn't challenge anything. Ever. It just paints as accurately as it can. And if that accuracy is directed within certain terms by the left hemisphere, the right can, and immediately will, fill in the gaps within those terms.
The certainty of left hemisphere thinking literally sets the boundaries within which the right can operate.
But when the illusion of mind is filled in with vibrant, vivid quality, invested and painted in the colours of emotion and feeling, it becomes something else, something far, far more powerful. Something that very much fits the bill as a mating display, in its compelling power, colour, vibrancy, and the absolute centrality of it in human life.
Something that dominates the human experience of living in a way that nothing else does. A fiction so pungent and vivid that it can and has utterly dominated the lives of the overwhelming majority of all humans who have ever lived.
A fiction that can now, for the first time, be brought into crystal focus.