It would be like a search engine for ideas and concepts.  Perhaps something like public roam graphs will be the solution to this, but there are infinite ways to approach it.

Writing, more visibly and unquestionably today than ever, is inherently networked. It begins and remains connected to its subject, and to everything else, becoming part of it. It acts. It does work. It lives. When we write, we reconfigure the world.

Complex, meaningful ideas are not linear; they’re networks, fractals, and systems.