Have you ever thought about this, Eric could be Divergent and that he could be working for Jeanine as a cover and that deep down he really wants to tell people. But have you ever thought about that scenario. Who ever tested Eric at his aptitude test must have a reason why he choose Dauntless. He might of chosen Dauntless because that would give him some coverage from being under covered as a divergent. Like he might be lying to Max as well. Because he was from Erudite which might be the reason why he defeated from that faction. Like Tobias did, he defeated because of Marcus beating him at home and constantly being scared of his own father. But have you ever did think about that one. So who knows, Eric could be a divergent but heavily undercover because of his strong, nasty personality that he has built for himself.