Dubious origin, lots of other copies:

(17 points) https://news.ycombinator.com/item?id=44316114

(30 points, 3 comments) https://news.ycombinator.com/item?id=44318192

(12 points, 4 comments) https://news.ycombinator.com/item?id=44320243

(26 points, 15 comments) https://news.ycombinator.com/item?id=44321381

(9 points, 2 comments) https://news.ycombinator.com/item?id=44322204

(11 points, 2 comments) https://news.ycombinator.com/item?id=44322288

(10 points, 3 comments) https://news.ycombinator.com/item?id=44322588

(10 points, 2 comments) https://news.ycombinator.com/item?id=44328038