 Complete the following phrase:  The users of r9k built upon by then popular 4chan memes epic win and fail to group the human population into alphas, or stereotypical well-adjusted popular people, and betas, or stereotypical geek-ish social rejects, self-identifying with the latter. It became a popular gathering place for the controversial online incel community. The beta uprising or beta rebellion meme, the idea of taking revenge against women, jocks and others perceived as the cause of incels problems, was popularized on the sub-section. It gained more traction on the forum following the Umpqua Community College shooting, where it is believed that the shooter, Chris Harper-Mercer, also warned people not to go to school in the Northwest, hours prior to the shooting as users encouraged him. The perpetrator of the Toronto van attack referenced 4chan and an incel rebellion in a Facebook post he made prior to the attack, while praising self-identified incel Elliot Rodger, the killer behind the 