I feel, the information is still too scarce. Currently, if all the information be proved true, we can say nothing except that there is something unusual which could possibly happen when near death occurs. Perhaps there is some unusual brain activity.
Information quantity (or information amount?).
Sometimes when you enter a curious and unfamiliar domain, you would expect that you wouldn't receive too much information, so your expectation about information is quite low, based on that, if you receive some information, you would then surprise, you would say that's super vivid and detailed.
We originally expected near death experience subjects could feel absolutely nothing during their brain not working (not working at least perceived by current science), so whenever there is something reported, that should surprise us and we label that as vivid and detailed.
No, that's not. Actually, the so-called verified out of body senses which were in accordance with real world, are in all very vague and information-lacking.
We use our senses to perceive this world, our senses can deceive us, so no one can know anything is absolute real for 100% certainty. The whole world could be an illusion.
However, this doesn't mean that, there is no point talking about whether it is real or not, how real or how not real. We observe more information, we "feel" more real. Charlatans can deceive us but if we ask more and more information, they would feel more and more difficult to continue the deceive.
Our brain has a limitation to produce sufficient information to cheat us, to force or lure us to believe something is real. In our dreams, our reasoning and judging and self-judging ability was asleep, so we didn't question the real or unreal when we were dreaming. After we woke up, we compared the information quantity in dreams and the real world, found that was a dream because that was created by brain with its limited imaginative activity, and the real world has much more abundant information quantity.
We can't absolutely prove a thing to be real, but more information it reveals, the more possible it is real. Our brain can easily fool us with something which contains only a little information.