If they had experience brain death they wouldn’t be here talking to you. > Death is the permanent end of all biological functions that sustain a living organis

If they had experience brain death they wouldn’t be here talking to you. > Death is the permanent end of all biological functions that sustain a living organism. It is no longer defined as the cessation of heartbeat (cardiac arrest) and breathing, as CPR and prompt defibrillation can sometimes restart both. In modern medicine, when a definition of the moment of death is required, doctors and coroners usually turn to "brain death" or "biological death" to define a person as being dead; brain death being defined as the complete and irreversible loss of brain function (including involuntary activity necessary to sustain life). https://en.wikipedia.org/wiki/Consciousness_after_death#Death https://en.wikipedia.org/wiki/Consciousness_after_death#Deat... TL;DR - you don’t come back from actual death, or you didn’t actually die. There’s no coming back from all biological function ending.