We've all heard a ton about Google's RankBrain over the last while, and even yours truly delved into it and into a word vector patent as well. But there's been something that wasn't quite complete. Something my geek friends and I have considered as waiting for the other shoe to drop.
You see, from all that we've learned, ol' RankBrain has been stated as something that was being used to better understand queries. And that it's been most affective in query spaces that are more ambiguous (or unkown queries). To that end, I journeyed down a path that lead me to word vectors, machine learning and neural nets (the AI component, potentially an extension on Google Brain).
But what about the other end of the spectrum? What about the actual indexing of documents?