Abstract

I am very grateful to Simon Beck for his thoughtful response to my paper “Transplanting Brains?” (2016). Needless to say, he raises more issues than I can hope to answer in a brief response. While Beck seemingly feels that the deck has been stacked against him, I think that the majority of his criticisms result from misconceptions and misunderstandings that I intend to straighten out in what follows. Before proceeding, I would like to draw attention to a worry that is lurking in the shadows. Perhaps Beck and I talk at cross purposes. While Beck is concerned with a metaphysical theory of personal identity that supposedly holds across all possible worlds—and as such places heavy importance on counterfactuals and intuitions—I am concerned only with the natural world with the aim of generating empirically substantiated hypotheses about how things really are when it comes to persons persisting through time. Now, here is a disclaimer: If the natural world does not exhaust reality, then my discussion is only partial. It goes without saying that most contemporary philosophers given a choice between going with science and going with intuitions, go with science.