In the tech industry, barely a week goes by without one entity saying that another one is doomed. Mostly, however, we just ignore them, but when Princeton claimed that Facebook would collapse in 2017, the social network decided to get its own back. With tongue placed firmly in cheek, data scientists Mike Develin, Lada Adamic and Sean Taylor copied Princetons slightly suspect method to discover that the university would effectively run out of students by 2021.