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Can you provide a link to where Hawking said this - it seems at odds to my understanding (which is very vague) of Hawking's 1974 paper. there is the problem of information loss in black hole evaporation per the original ideas of Stephen Hawking - but various strategies have emerged to prevent information loss. Bekenstein showed that information and entropy was linked and proportional to the surface area of the black hole - but Hawking for many years had no problem with that information being lost during evaporation (he has now admitted that he was probably wrong and paid off on a famous bet) so I am not sure why he would be adamant that the surface are did not change

Quote from: imatfaal on 09/05/2011 11:30:03Can you provide a link to where Hawking said this - it seems at odds to my understanding (which is very vague) of Hawking's 1974 paper. there is the problem of information loss in black hole evaporation per the original ideas of Stephen Hawking - but various strategies have emerged to prevent information loss. Bekenstein showed that information and entropy was linked and proportional to the surface area of the black hole - but Hawking for many years had no problem with that information being lost during evaporation (he has now admitted that he was probably wrong and paid off on a famous bet) so I am not sure why he would be adamant that the surface are did not change http://en.wikipedia.org/wiki/Timeline_of_black_hole_physicshttp://en.wikipedia.org/wiki/Hawking_radiationPerhaps this is the bet I don't know but as I understood it the bet had not been resolved.http://en.wikipedia.org/wiki/Thorne%E2%80%93Hawking%E2%80%93Preskill_bet

In 2004, Hawking announced that he was conceding the bet, and that he now believed that black hole horizons should fluctuate and leak information, in doing so providing Preskill with a copy of Total Baseball, The Ultimate Baseball Encyclopedia.[1] Comparing the useless information obtainable from a black hole to "burning an encyclopedia", Hawking later joked, "I gave John an encyclopedia of baseball, but maybe I should just have given him the ashes."