sentences:  The most ethically questioned and least scientifically explored ingredient of the powders is part of a recently buried child's brain.The process described by Davis was an initial state of deathlike suspended animation, followed by re-awakening — typically "after" being buried — into a psychotic state.The psychosis induced by the drug and psychological trauma was hypothesised by Davis to reinforce culturally learned beliefs and to cause the individual to reconstruct their identity as that of a zombie, since they "knew" that they were dead and had no other role to play in the Haitian society.