Nice thoughts. I think the fictional writer example is the clearest example, as a writer creates worlds within the real world.

Maybe this is could be more about information compression? The author notes that the sliver of the "hologram" doesn't necessarily contain the whole, but it's an interesting idea. If you choose a topic, there are minor aspects of much larger ideas. You then have to decompress as you learn more about the context of the information. Like in the fictional writer example, you move outward from the focus and learn more about say the history of when the writing was completed. There will be elements of that context in the writing, but clearly not as much, because the information density of the fictional work is clearly smaller and cannot contain the entire context.

Now I wonder how holograms and compression are related...