This is the conclusion at the end of the of the 2 introductory paragraphs from your source.
Those who believe in the reality of NDE assert that the patient remembers what happened during the flat-EEG period, but this is not conclusively scientifically verifiable.
So your source does not support your assertion.
From this same site this was said: "A believer, when evaluating cases of NDE, cannot exclude the intervention of the devil during the final stage of recovering from a state of coma. The devil, as theology tells us, is able to induce dreams or visions."
This a religious site and not a scientific site. As such it is not exactly a good source to cite for a scientific discussion.