Two hemispheres - I do not think it means what you think it means
I am going to address some misconceptions about brain hemispheres -- in popular culture, and in Zizian theory. The latter, because the madness must stop. The former, because it provided a foundation for the latter. * Two hemispheres in popular culture About 99% of animals are bilaterally symmetric -- the left side and the right side of the body are approximately each other's mirror images. The symmetry is not perfect. For example the human heart is situated slightly on the left side, and its left and right halves have slightly different functions. But in general, it seems like once Evolution Fairy has decided that bilateral symmetry is a good idea, it was easier to keep designing all new organs symmetrically. Butterflies have pairs of wings, humans have a pair of hands. Sometimes it means that organs come in pairs: we have a pair of eyes, and several pairs of ribs. Sometimes it means that organs have two connected parts, such as the left lung and the right lung. Some organs along the sagittal plane only have one approximately symmetric part, for example the stomach or the vertebrae. The brain is not an exception to this rule. The parts that come in pairs include the cerebral hemispheres, the cerebellar hemispheres, basal ganglia, thalami, hippocampi, amygdalae, etc. The symmetric parts on the sagittal plane include corpus callosum, medulla, pons, midbrain, pineal gland, hypothalamus, hypophysis, etc. Popular culture simplifies this as "we have two brains". Simplifications are inevitable, but I wish humanity had settled on something less confusing and woo-inspiring, such as "the brain has two sides". Instead, it is known that: * the left brain is logical, the right brain is creative * the left brain is mathematical, the right brain is artistic * the left brain understands languages, the right brain understands music * the left brain prefers Android, the right brain prefers iPhone ...okay, I admit that I made up the last one. The rest is an oversimplifica
Just nitpicking, but I would classify self-play as a subset of R&D. The AI is exploring some... space... by experimenting and learning, it's just a very narrow space.