The "possibility of recovery", as you put it, is a moving target depending on the specific situation and the technology involved. For some examples: https://www

The "possibility of recovery", as you put it, is a moving target depending on the specific situation and the technology involved. For some examples: https://www.wired.com/2014/07/revive-the-dead/ https://www.wired.com/2014/07/revive-the-dead/ The point being that as technology continues to develop in this area, our understanding of when someone is "dead" may also continue to shift. There's also the classic example of comatose people.