intervals. For the computer now on the desk, at the end of this process, is made up of modules yi... yio, while the computer which sat on the desk ten months ago was made up of the entirely distinct modules xi... xio. If these are the same computer, then by OC there are worlds u and v where, respectively, the given computer is made up ofxi... xio as long as it exists and yi... yio as long as it exists. But there is also the world w where, amongst other things, there are two computers, one made of yi... yio as long as it exists and the other of xi... xio as long as it exists, both machines existing simultaneously in different places. We may therefore pose the question: (3) Which, if either, of w’s computers is the one on the desk in the actual world? No answer to (3) is consistent with reasonable views about identity, for whatever answer we the following will be true:
2013 ◽
pp. 232-239