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The idea that the brain was split into two halves was first introduced to me in the book Drawing on the Right Side of the Brain. It was a popular idea in the 1990s, spawning a veritable cottage industry of books elaborating how one could exploit the full capacity of one's brain. In retrospect it all seemed a bit naïve although a clearer view of the brain's duality still suggests that certain functions are compartmentalized in the two hemispheres.

So while the story partakes of some of the mythology of the era I think it actually holds up rather nicely as a meditation on duality.