A broad class of plausible models of NDEs assign them some property that is, in effect, verifiable; in semi-Popperian terms, the absence of that property is falsifiable.

This class includes all models in which NDEs enable subjects to report a fact about about the physical world that should be unavailable by ordinary means. Examples include NDE models in which reports of seeing the physical world from a position outside the body are are taken at face value.

Given what we know of the shocking unreliability of eye-witness reports, the standard of evidence for rare NDE observations of this sort must be quite high, but there is no reason why the standard could not be met. Further, in many reasonable models, the standard would be met so routinely and decisively that the matter would never have been in question.

In particular, there is a class of models in which NDEs have a teaching purpose, and the teaching is performed by reasonably knowledgeable and competent agents of some sort. By the nature of "teaching", these models naturally lead to the strong expectation that we would have clear, routine, and age-old evidence. Models in which teachers withhold strongly evidential information seem to me to strain credibility.

Words and ideas I offer here may be used freely and without attribution.