What does the nonbranching proposal say about splitbrain pat

What does the nonbranching proposal say about split-brain patients? Are there two people present in the body? If so, is either identical with the person who occupied the body before the operation?

Solution

Answer: Split brain experiment is a hypothetical situation of the brain transplant. The question arises that which one would be the person after transplant, the brain donor or the brain recipient?   

Nonbranching proposal says that two persons are identical only when the psychology is in the continuation and not branched off at the causal level. There will be only one person in the body because of non-continuity of the causal psyche. According to the Nonbranching proposal, the survivor would be a third person, neither brain donor nor brain recipient.