  Let's grant that to have a thought determinately about an individual in a reduplication universe requires possessing an irreducible, fundamental form of demonstrative identification. What bearing does that have on thought about individuals in nonreduplication universes and in particular thought about individuals in our universe, which we take, rightly we can suppose, to be a nonreduplication universe. Although Strawson does not argue in this way, the following seems compelling. Grant that our universe is in fact not a reduplication universe. But it could have been. Had there been, in some distant part of the universe, a qualitative duplicate of me and my surroundings, my thought would not have taken a different form than it actually has. But the considerations above show that, had we been living in a reduplication universe, then demonstrative identification would have been irreducible and fundamental. But then it is actually irreducible and fundamental.