In the novel, Haruka points out to Tanaka that he's trying to use math and probability in a universe where you can roll a 6 sided dice and get M (infinity) as a result. I.e., it's a universe that runs on narrative logic, not mathematical logic, and thus, Tanaka's theories are flawed and doomed to failure from the start, because Tanaka's a math nerd, not a literature nerd, and he fundamentally can't understand this new world they're in. He even points out that neither Tanaka or Haruka are protagonists, the protagonists are the Class Prez, the leader of the geeks, even the leader of the bitches or the jocks. Tanaka and Haruka are just the comedic side characters, and thus not deserving of an epic fight scene.