If we can't consider it open why do we consider the question of the values of two different human beings open? Unless we choose to define humans so as to exclude some Homo Sapiens brains that occupy certain spaces of neurodiversity and/or madness?
For the question about human values, there are ways to put it so that it's interesting and non-trivial. For values of unrelated minds, the answer is clear however you interpret the question.
Yesterday I sat down with Lukeprog for a few hours and we produced this ten-page interview for the Singularity Institute blog. This interview contains information about the Singularity Institute's technical research program and recent staff changes that hasn't been announced anywhere else! We hope you find it informative.
http://singinst.org/blog/2011/09/15/interview-with-new-singularity-institute-research-fellow-luke-muehlhuaser-september-2011/