> However, there’s nothing about the square structure that dictates the edges must represent phrases and synonyms.

I got there and thought "Category theory", and, lo, that's the next paragraph.

> Let’s talk about Scrabble, one of the seven most important games [link to review of Seven Games book] https://www.nytimes.com/2022/01/25/books/review/seven-games-...

Seven Games was mentioned in another HN discussion last week, by 'danvk talking about his Boggle solution: https://news.ycombinator.com/item?id=44084022

HN hasn't yet taken an interest in that: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...