1. Department of Philosophy, 200 Gregory Hall, 810 South Wright ST MC-468, Urbana, IL 61801, University of Illinois at Urbana-Champaign, USA
2. Department of Physics, 1110 West Green ST, Urbana, IL 61801, University of Illinois at Urbana-Champaign, USA
3. Illinois Center for Advanced Studies of the Universe, University of Illinois at Urbana-Champaign, USA