Abigail and Brittany Hensel, born 1990, midwest USA
A very rare, dicephalus pair, they have separate heads and necks, but share one torso and a pair of legs. Each has her own heart and stomach, and controls the limbs and feels sensation exclusively on her own side. They share three lungs and, below the waist, a single set of organs. Physically they move as one, in perfect co-ordination. Mentally they are independent, with different preferences and abilities. Their parents are opposed to separation, which would be highly dangerous. Even if successful, the girls would be left severely disabled, and unable to enjoy walking, running, swimming and bike riding which, together, they can do easily.
I am a Cartesian Dualist - I think! Does this situation above not solve the Mind/Body, Mind/Brain problem?