Re: Retroactive prayer: a preposterous hypothesis?
Scientific studies and official research in the field of Psychology have already proven that human consciousness remains intact, even after the death of the body/cardiac arrest/zero electrical brain activity/etc.
Hospital studies on thousands of patients, with complete recording of clinical data, demonstrated the indestructibility of "human consciousness". 
Memories, emotions, experiences, thoughts, persist intact, in an immaterial form, even after the recorded death of the brain/heart/body, and furthermore, new experiences can be recorded and persist, beyond somatic mortality.
Indeed, individual human consciousnesses interact and communicate to form a global consciousness, with significantly recordable universal responses. 
Materialists, Atheists, Agnostics, etc, will have difficulty to explain "life after death", eternal immaterial existence of human consciousness, long range interacting human emotions, etc.
Religions of the World, on the other hand, had been spreading this knowledge for Millennia, the design of an immaterial immortal eternal human soul.
A published systematic review of the randomised, placebo controlled trials of distant healing, through remote retroactive intercessory prayers, showed a clear positive treatment effect in 57% of them. 
Competing interests: No competing interests