Hilzoy gets an e-mail from sleep expert Dr. James Horne. The memos released last week cite his work to 'prove' that sleep deprivation works as an interrogation technique:

Even if one was to be pragmatic and claim that this form of sleep deprivation produced ‘desired results’, I would doubt whether the state of mind would be able to produce credible information, unaffected by delusion, fantasy or suggestibility.