The underlined comes down to a few simple realities. First, I am confident it is Sark's ego that leads him to go right back to the offense that hasn't worked time and again. He actually believes, due to his ego, that somehow, some way it will, this time. Why? Because I think his ego has unfortunately allowed him to drink his own coolaide with help from media and others that he is an offensive genius. Second, all of the staff on offense are long-term friends of Sark's. Essentially, yes men that aren't questioning or arent in the position to question his choices. So nobody is checking Sark on them at all. (CDC should step in here) Third, because of the first two, not having contact drills in spring or summer, all combined with poor talent evaluation skills and a flat unwillingness to align the game plan to the strengths of the players and weaknesses of opposing defenses, Sark believes, actually truly believes that it will work, has to work. Part of that is the law of diminishing returns he has fallen victim to. His ego says he was right, he's been trying to show he was right all season long, if it now reverses course after all this time, effort and energy he will be forced to admit, to both himself and the world he was wrong. He can't be wrong because he's a offensive genius. He's coached these players, they will execute it next time. It's impossible that they won't, because he's a genius, came up with this scheme and knows they are capable.