We can talk about people's experiences with dying, but dying, or being near death is not after death. NDE's are not experiences of death, by their very definition. Clinical death is determined based on equipment that is available bed-side. To claim that near death experiencers are actually dead, and therefore experiencing a glimpse of the after life, is based on a presumption of clinical death. Until we are able to hook up more sensitive monitoring equipment to dying patients (a very difficult if not impossible task), we are limited in our definition of what death really means, especially in terms of brain state at the edge of life. This is the one point NDE studies and commentators continually fail to acknowledge. We are not studying death, we are studying dying. The fact that people come back to tell us of their experience attests that.
This is totally correct in terms of what an nde is - but I strongly disagree that those studying that state of awareness 'continually fail to acknowledge' it.
In my experience it is a notion that allows those unwilling to explore that state of awareness to discard investigation of it as a real state of awareness.
In my own experience of working with scientists and different explorers over more than 30 years not one of those investigators has ever said this is 'death', only their detractors refer to it in that way. I detail my position more in the topic (Not) Proof of Heaven to me - referring to the title of neuroscientist Dr Eben Alexander's book - it may have been proof of heaven for him, but not for me.
More recently those in those circles of investigation have been trying to come up with a consensus on what to call it to avoid this bias - for me 'death' doesn't even come into it, while physically my brain and body were more than 'compromised' in terms of what medical science dictated that I 'should' have any awareness, let alone the expanded awareness, I was more 'alive' than I have ever been, and many other nde experiencers share the same view.
If ... and I stress IF it is any indication of the state of awareness after death, then still 'near death' has no relevance, and neither does the word 'death' as we take it to mean the end of life. It was an opening up of non physical faculties - or at least not limited by physical faculties - not a diminishing of them.
Those that extend it into 'death' do so because of the clinical parameters of the physical body, and you are right, we cannot yet measure with any accuracy levels of awareness. I take heart, I really take heart (cheered and whooped and hollahed) that the Nu Complexes (beyond flat line) field has been noticed, even though no one yet knows what it means - I take heart in that only because it was where science believed there was a calculated an end point
of energetic flows, and it is now known that that was prematurely limiting.
My acceptance --- albeit I'm leaving room for correction if it is found that the living human brain has a capacity to transcend time, space, individual experience and perceptions, memories etc and that capacity dies with physical death -
My acceptance of the notion of awareness beyond physical death - is based not on the nde as such, but on empathic 'now' sharing of accurate information and perception. As in an energy of one no longer in body sharing information that was not available within an individual's physical awareness at or before their death (and so energetically limited to the physical dimensions while a body was 'alive') that can be proven to be true, accurate and where the 'source' of the information is not in body.
The sorts of things I'm speaking of is evidenced information concerning events surrounding the person's death that may have been distorted or misunderstood, that have been forensically supported on investigation where there was no investigation or knowledge previously; corrections of misunderstandings; sharing of accurate information in events that have not yet occurred on this 'plane / level / dimension' that unfold exactly as described, or past events that on investigation are as was described; passing on requests with regard to 'unfinished business' etc to third or further parties, so after death communication really.
In my understanding, and in experience, the 'personality' of the person is accurately identified in up to triple blind conditions (eg an entity describes them self and their relationship or an event to a 'sitter' who is unknown to the medium to take to another person unknown to the medium to have it evaluated or evidenced) these events may be accurately descriptive of past, present or future relationships or events.
The historical reasoning behind limiting this awareness, and the free studying of it, is that it sees all, shares all which is similar
to the unlimited awareness experienced in an nde if that wider universal awareness is accessed.
One cannot distort power amid the truth of a thing. Those that seek to close it off or shut it down do so in fear of the truth, not in support of it.