There is some game theory involved. If everyone ALWAYS ran for two point conversions, the defense could just ignore the pass and put 11 in the box and stuff th

There is some game theory involved. If everyone ALWAYS ran for two point conversions, the defense could just ignore the pass and put 11 in the box and stuff the run. The its most likely that the optimal solution is a mixed strategy; you're going to need to mix it up to keep defenses honest.