If NDEs were completely random I'd say you have a point. But there is a commonality. Why would the brain mess up in this particular way, with
these themes? What is the evolutionary advantage of that according to physicalism, gap?
You make a good point.
I don't know if it has an evolutionary advantage. Not everything the body does has an advantage... it would just be down to chance to some extent, or the side effect other other uses.
The people who have had NDEs have had dreams in their lives. They know what a dream is like and they describe the NDE as being very different than a dream. The way they describe encounters with deceased family members and pets who tell them they have to return to their bodies is very different from a random "dream about their family." An all encompassing "life review" is very different from a random "dream about their past." So I don't see what your point is.
Well they wouldn't be the same as dreams. But just because they seem different doesn't mean they aren't illusions.
Dreams don't contain
specific common themes in relation to specific common bodily states. When we have a backache, we don't commonly dream of getting a massage. When we have a cold we don't commonly dream of staying in a hospital. There is no direct correlation: this common bodily state produces that common dream content. So, apples to oranges, NDEs are not dreams and have very little in common with them.
Well NDE's are unconscious experiences... so they have that in common. Also, when you need to pee in real life you can need to pee in a dream too.
Here I have rephrased it.
NDEs commonly involve specific experiences related to crossing over, the traits of a classic NDE.
Hallucinations or dreams do not commonly involve the traits of a classic NDE.
All I have heard is that NDEs are no more indicative of life beyond death than are dreams or hallucinations, despite the fact that unlike most NDEs, neither dreams nor hallucinations commonly involve the traits of a classic NDE. Meanwhile the traits of a classic NDE make perfect sense relative to the "near-deathness" of the person having the experience. The content is appropriate to the situation.
Why is there this specific content about dying and crossing over to an afterlife realm when a person is near death; what is our physiology's purpose for generating this specific content when a person is dying?
I don't consider "NDEs are just as unreal as dreams or hallucinations" a direct answer to this question.
How do you know that some of these experiences aren't merely rationalized by the conscious mind afterwards? The actual experience could have just been a load of lights and feelings, but only afterwards are these turned into something understandable. The interpretation of them being related to death could just come after waking up. On the other hand, some drugs can make people feel like they are dying when they aren't. Something like that could perhaps be released from a dying brain.
You say these experiences are related to death, but I don't see that to be true. Feelings of peace aren't necessarily about death, and could easily be explained by chemicals released by the brain to cope with the trauma of death. The feeling of being out of body (which happens to living people too), can be caused by the brain mechanisms which makes us feel attached to the body and behind the eyes can mess up.
The tunnel of light, and the experience of growing light, could be the dying visual cortex trying to interpret the remains of brain activity. Beings of light could similarly be a combination of the dying visual cortex along with a faulty perception of where another person is. This can happen to a living person, where they feel like they are being watched by someone who isn't there, or feel like someone is next to them when no one is.
All the above don't necessarily have anything to do with death. They are just interpreted that way once one wakes up and tried to rationalize the experience.
The perhaps harder to explain experiences are that of seeing dead relatives and having a life review. The first could perhaps be explained by the mind feeling like it is dying, which reminds it of relatives that have died. I'm not sure why flashbacks happen, but they do happen to non-dead people as well, such as if you get hit on the head.
I'm not sure if that answers your question though. I hope you don't mind me trying to prove you wrong.
