Then, too, there's also evidence that right and left brains can affect behavior quite differently. In some of Sperry's investigation with monkeys, one side could be stroking and fondling a little rag doll while the other might be thrashing the tar out of it. Sperry's group also found evidence that people act similarly. We're not acutely conscious of differences within our own head, possibly because of the brain's capacity to suppress or even repress much of what it actually stores. Consider right and left handed people.
Many lefties find it easier to write backwards.
Leonardo Da Vinci did. That a left handed person can write at all may be a kind of minor miracle, in itself. Their brains must turn things around. But that the brain can make adjustments and compensations probably accounts for typical southpaw deadliness on the pitcher's mound. The two cerebral hemispheres aren't duplicates.