I (the author) and another person independently thought of it in the comments of an article a couple months ago: https://news.ycombinator.com/item?id=25501263 h

I (the author) and another person independently thought of it in the comments of an article a couple months ago: https://news.ycombinator.com/item?id=25501263 https://news.ycombinator.com/item?id=25501263