Yes, I should have remembered that paper, especially since Nick acknowledges me (along with Hal and Toby and others) in it.

Do you think our preference for A (speaking for those who do prefer A) is entirely accounted for by a (perhaps partial) belief in what Nick calls Unification? Or is there also an ethical element that says two identical streams of qualia is not twice as valuable as one? Do you know of any published or unpublished ideas that deal with that question?