some 10y+(?) ago, i had an idea of building a model/graph of one's own notions (what is "red"?) and how do they relate to one another, and to others' such graphs - from your perspective... Back then abandoned it because looked like impossibly-huge to build, semantical-web was only leftovers-and-promises.. But a year later, this same thing you are talking about, occured to me and then i abandoned it completely. Crossed it out. Yeah, That thing would be extremely useful but even more dangerous as it will know more about you than you.

btw. There's a new book by Kazuo Ishiguro - named Klara and the sun. Along the same vein - Have a look.

https://en.wikipedia.org/wiki/Klara_and_the_Sun

ciao

p.s. see also Lena by Charles Stross. or this: https://www.antipope.org/charlie/blog-static/2023/01/make-up...