The White House disqualifies the UN report on Guantanamo because its authors have not been at the US prison camp in Cuba. Or, more precisely, because they refused the guided tour that was offered to 3 out of the 5 international experts. They would not have been allowed to speak to the detainees during this perfunctory visit.
The draft report, leaked, concludes that some of the practices at the prison camp are acts amounting to torture. It mentions the new coercive feeding methods that have been used to break the most recent hunger strike. It establishes that several of the detainees rights are violated, including their right to a fair trial.
"Hearsay", says the administration, discounting the testimonies of prisoners that have been released, and of their lawyers. The only thing that would not be "hearsay", apparently, would be the word of the Pentagon. Mum.