Hippocrates devised his theory of the 4 humours (blood, phlegm, black bile and yellow bile) 24 centuries ago. Since then, medicine has evolved into a complex body of confusing and sometimes contradictory facts. The authors, seeing a need to determine the validity of his theory, hired a psychic.
The psychic interviewed 4 eminent ancient physicians, including Hippocrates. A randomized double-blind cross-over design was used for this meta-life qualitative analysis.
All of the interviewees agreed that the theory of humours is an accurate model to explain disease and personality.
Hiring a psychic to conduct after-death interviews with key informants is a useful way to validate scientific theories.