He described a new technique – ‘an adaptation of Hebb’s psychological isolation’ – that involved bombarding patients with recorded audio messages, repeated thousands of times, either when they were in a drug-induced sleep or on LSD. Patients would resist, Cameron acknowledged, but ‘if they are continuously overloaded their breakdown is to be expected’. He then added something that caught the eye of John Gittinger, the CIA’s resident psychologist. ‘Analogous to this is the breakdown of the individual under continuous interrogation.’