If we can't look within without being told our inner world is an illusion 13 billion years in the making ...
Illusion is too strong of a word. Our phenomenal experiences of reality are filtered and subjective. That is, the information we receive and integrate from the environment will be different from all other organisms, including humans for a plethora of reasons.
Thus, our inner world isn't so much an illusion as it is a filtered, specialized version of the totality of what-is.
1 Corinthians 13:12King James Version (KJV)
12 For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.
I read the following two papers and while they were interesting, I found them ultimately unsatisfying. Also, both seem to take a physicalist stance. And both are restricted by the limitations of language: the first gets bogged down over the meaning of thing/object, the second over the meaning of substance. Both papers I feel suffer from lacking a Whiteheadian approach to the nature of reality.
Galen Strawson: The Self
(iii) The discussion of materialism has many mansions, and provides a setting for considering the question ‘What is a thing or object?’ It is a long question, but the answer suggests that there is no less reason to call the self a thing than there is to call a cat or a rock a thing. It is arguable that disagreement with this last claim is diagnostic of failure to understand what genuine, realistic materialism involves.
http://www.timcrane.com/uploads/2/5/2/4/25243881/inaugural.pdf
Persons are substances in this sense, beings with a special balance of psychological and bodily characteristics. It is worth noting that something like this idea is suggested by some famous remarks of Descartes, which are rather out of harmony with his dualistic view of soul and body:
‘I am not lodged in my body like a pilot in his ship, but, besides ... I am joined to it very closely and indeed so compounded and intermingled with my body, that I form, as it were, a single whole with it.’
Hm, that quote by Descartes dovetails nicely with the information philosophy theory of mind, in my opinion, as the physical brain and the informational mind share just such a relationship as described.
I haven't read the following yet but it's on deck:
https://ethik.univie.ac.at/fileadmi...__T._1990_There_is_no_quest.._Physicalism.pdf
However, I'm not too interested per se as I don't think our understanding of the physical world is complete by any means, and I think any dualistic version of reality is false. What I'm saying is that any suggested dichotomy between mental/physical or mind/body is a false one.
Regarding the value of phenomenology and introspection: I do value it, however I think it's value is finite. We know that what people think and experience is often not isomorphic with reality, indeed, as per above, cannot be. Furthermore, cognitive distortions and sensory illusions are well documented. I don't think I need to list them here.
Furthermore, while phenomenology can be used to explore the structure of the mind from the inside, what it can tell us about its nature and origin is limited.
I'm sure the following will fall on deaf ears but I was recently considering working memory:
Working memory - Wikipedia, the free encyclopedia
Roughly speaking, working memory is an important facet of intelligence. It's the process/system by which an organism (brain) temporarily holds "information" in mind for on the fly use and manipulation.
For instance, one is using WM when they are doing mental math, trying to recall a phone number they were just told, or trying to mentally picture a room and rearrange the furniture.
Some people have a much stronger WM capacity than others. Many people who struggle with math have poor WM and thus struggle with mental math, etc.
For example, if you were to ask people to visualize the following list of animals as you read it out loud and ask them repeat the list back to in reverse, you would find that people would have varying amounts of success:
Pig horse dog mouse cat fish shark whale
My wife would be able to repeat the list back to me in reverse with almost no problem. I would probably only recall the first two. Honestly.
What is going on here? Why can some brains maintain phenomenal mental images of these animals and some can't? It's not that these people (brains) can't produce phenomenal images of each animal individually, because they can. It's just that the can't maintain these phenomenal images all at once while some people can.
My conclusion is that there must be some intimate relationship between brains, phenomenal experience (mind), and information. As noted, I believe the mind is information.
Re: NDE and sustained personality change. Similar phenomenon have been recorded with DMT and psilocybin trips.
If you're suggesting that this phenomenon means physicalism is false or that dualism is correct, I don't follow.
Likewise with psi phenomena.