"In order to see that it is conceivable that one person should have pain in another person's body, one must examine what sorts of facts we call criteria for a pain being in a certain place.... Suppose I feel a pain which on evidence of the pain alone, e.g. with closed eyes, I should call a pain in my left hand. Someone asks me to touch the painful spot with my right hand. I do so and looking around perceive that I am touching my neighbor's hand...This would be pain felt in another's body" -Wittgenstein