Guest Post: Joe Polchinski on Black Holes, Complementarity, and Firewallshttp://www.preposterousuniverse.com/blog/2012/09/27/guest-post-joe-polchinski-on-black-holes-complementarity-and-firewalls/ by kdavis • 13 years ago 1 0 13 years agoPRpreposterousuniverse.com