AFAIK, the part that's been debunked is that there's a complete separation of concerns between the two hemispheres. From studies on split-brain patients, there

AFAIK, the part that's been debunked is that there's a complete separation of concerns between the two hemispheres. From studies on split-brain patients, there does appear to be some specialization, but it's much fuzzier than "right brain does art, left brain does analysis" or anything like that.