system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If people "die", and "come back" then isn't it time to redefine death?

e.g. "He was legally dead for 8 minutes". Um. No. How so?
gpt
People confuse the "Heart Stopping" with actual death.  I've heard doctor's actually say "He died three times on the table"... weellll ok, kinda.  Most people won't come back if their heart stops.  Completely stops.  Something has to happen to get it to beat (correctly), again.

I've been in medicine for quite awhile, and I've never seen someone actually "Legally Dead" for any period of time other than "He died at " (pick a given time).  Once you're legally dead, you're dead, barring weirdness (call it a miracle, if you want).

HOWEVER, it is time to redefine death.  We're finding out that stopping the heart, chilling the body, and doing a couple of other things (that make the patient look really, really dead) may give us enough time to start fixing problems.

Hell, already in medicine, we have different criteria for "death".  A popular one is "You're not dead until you're warm and dead", talking about hypothermia patients that arrive without a detectable pulse.
Cardiac death versus brain death versus organ death.  Really important when it comes to things like organ donation.