One dumb argument I've heard about Orton/Tebow is that Denver MUST start Orton because he gives them the best chance to win games this year. If you think he can get you to the playoffs, sure, but if he's going to eke out 8-8 while starting Tebow makes you 6-10 but maybe figuring out if he can be your QB of the future, then no, you don't HAVE to start him.