"What is it that makes a person the very person that she is, herself alone and not another, an integrity of identity that persists over time, undergoing changes and yet still continuing to be — until she does not continue any longer, at least not unproblematically? I stare at the picture of a small child at a summer’s picnic, clutching her big sister’s hand with one tiny hand while in the other she has a precarious hold on a big slice of watermelon that she appears to be struggling to have intersect with the small o of her mouth. That child is me. But why is she me? I have no memory at all of that summer’s day, no privileged knowledge of whether that child succeeded in getting the watermelon into her mouth. It’s true that a smooth series of contiguous physical events can be traced from her body to mine, so that we would want to say that her body is mine; and perhaps bodily identity is all that our personal identity consists in. But bodily persistence over time, too, presents philosophical dilemmas."