The history of information retrieval is the history of the Inverted Index. For decades, the logic was simple: map a keyword to a list of document IDs. Term Frequency * Inverse Document Frequency (TF-IDF) ruled the world.

But the Inverted Index is a relic of the string-matching era. In the Agentic Web, we don’t match strings; we match meanings. And for that, Grokipedia has abandoned the inverted index entirely in favor of Neural Hash Maps (NHMs).