After the semantic map from the previous post, where I embedded 40 million posts and comments from Hacker News, I saw how the community not only supported the project with encouraging suggestions but also discovered how quickly the community shrinks from across the world into real life relationships. Robert (robg) reached out and we began discussing his work in the neural basis of semantic knowledge and how he built social semantic algorithms way back in 2008. Despite the intervening 16 years, w...