Actually, I will ALWAYS view NDE as a FAILED scientific concept. If you want to really test the afterlife, put spiritual mediums to a closed environment test. If a human you have never seen before can give you exact details on the deceased with no details from the test subject, ast the very least this implies scientifically that thought waves are transferable. and if the medium is able to transmit data from the deceased that can later be verified that the test subject did not know about, such as a hidden board under which is a secret cubby hole with a ring, that means that the data received came not from the test subject at all but from memories of the deceased. EVEN THIS DOES NOT PROVE THE AFTERLIFE!! It simply would prove that DATA, of a person still exists after death!! (Although I am more than willing to accept it could easily imply consciousness lasts beyond death. )
TESTING SPIRITUAL MEDIUMS WILL RESULT IN REAL DATA IN A WORLD WHERE ON PURPOSE FLATLINING "KILLING" OF PEOPLE IS NOT POSSIBLE.