These are experiences I've read about in multiple sources and, in one instance, talked with someone who has experienced what I've related. Rejecting them as imaginary seems a bit.
This whole thread is very interesting reading and reminds me of a hundred conversations I have had over the years.
JFish has repeated multiple times here that "there is evidence" or "there are many cases" etc., and his critics keep repeating "no there isn't (aren't)" .
Jfish, all they want is to be shown the cases where the "dead" person sees something they couldn't possibly have seen or known about otherwise. Like the case you mentioned about the woman who saw the saw. That sounds like an interesting example.
A skeptic will have many questions about this of course. Did she see the exact saw the surgeon was using? How do we know? Did the saw have some identifying marking which she was able to verify? I doubt it, one cranium saw looks much like another. Could she tell what brand it was? Something, anything which identifies the saw she saw as the exact one the surgeon used. Otherwise, a patient coming for brain surgery is described how the procedure is done, she may read about it, watch the learning channel, or have many other possible ways to know (before her operation) that the neurosurgeon will saw a hole in her skull. Once such a thought or image is present in the mind before the event, then you must admit that the mind is perfectly capable of constructing a "dream" containing those elements, without her consciousness leaving her body.
Likewise, the experience of the congenitally blind is intriguing. However, surely such a person has been wondering their whole life what it would be like to see? I would think a some point in their life it might be a constant preoccupation. I wouldn't be surprised to learn that blind people do sometimes dream of seeing, (although the one you mentioned specifically denied it) The fact that under the stress of hypoxia/hypercarbia/acidosis the brain has dredged up these thoughts surely is not surprising?
Given that a blind person reports a NDE in which she "sees", in what way is this related to vision through an eye? How can we we confirm that what she "sees" has any similarity to our vision using lens, retina, optic nerve, cerebral cortex, etc...? Why should it? The physical apparatus of the visual system limits what we experience as vision. Why should our unattached consciousness be similarly limited? Does the soul see infrared, hear ultrahigh frequency, smell as acutely as a dog? Why not?
All these described cases of NDE have similar problems. The conditions are not controlled. Every person's mind is filled, before the event, with sensory impressions of doctors, hospitals, surgery, etc. The fact that, under stress, the brain will manufacture "dreams" very similar to NDE is demonstrated fact. Why believe an NDE is more than that?
In any case, I hope I have clarified for you why what others are calling "stories" or "anecdotes" are not taken as serious evidence of consciousness existing separate from the Brain.