That is the reason why religious scams are so successful. Religious people don't care if what they believe is actually true.
They will believe it anyway, NO MATTER WHAT.
Well I'm guessing that the OP wants to discuss particularly the scientific evaluations and assessments of life and death, not exactly theoretical and spiritual. See scientists quote unquote have managed to find proof. I guess it would be worth it to review this.
Our organism and its neural network behaves similar to a capacitor in an electric system. You might see the system operating for short while after power is removed and the system discharges stored capacity/electric potential. Neurons might continue to fire after blood stops flowing and pressure drops. Cells will continue to die off, but not all at once. The actual dying process is not an ON/OFF type of thing. It takes few minutes for all cells die.
After an hour of no blood to your brain, you'll definitely be dead. Three minutes (as per OP) is quite possible.
System will discharge, cells will die, and even if heart starts pumping blood after an hour, nothing will happen. It will be like pumping blood to a chicken in your freezer.
The longer you are out the greater chances of a permanent brain damage.
In a large scale study of more than 2,000 people, British boffins confirmed that thoughts DO carry on after the heart stops.
The shock research has also uncovered the most convincing evidence of an out of body experience for a patient declared dead.
It had been believed the brain stopped all activity 30 seconds after the heart had stopped pumping blood around the body, and that with that, awareness ceases too.
However, the study from the University of Southampton shows people still experience awareness for up to three minutes after they had been pronounced dead.
What you are saying is no one is really dead, even after all the machines and tests are saying it is so and science was wrong not to wait at least another 3, 4 min for a definite conclusion?
Not into electronics but I remember that some capacitors can hold a charge for years after being unplugged, so...
Plug them into a circuit with small resistance and they will discharge rather quickly. If they are charged and not connected they can hold charge because of high impedance of the air between the +/- plates. The discharge of a disconnected capacitor happens but a much slower rate, depending on humidity and temperature of the ambient air.
Wow! Here you go trying to conceptualize the complexity of the human brain and nervous system by plugging it into an electrical system the same as a simple capacitor. You are behind almost 200 years - ask Mary Shelley.