Chip Kelly is the new head coach of the Philadelphia Eagles. This is more exciting than it probably should be; obviously, coaches change jobs all the time. But this feels different, somehow. Kelly is the best contemporary offensive mind in America (that’s an arguable designation, but it’s certainly the argument I would make if you put a gun to my head and started asking bizarre, subjective questions about football strategy). The Eagles are an elite NFL franchise in total disarray, habitually hounded by a fan base that despises everything (including themselves). There are landmines aplenty, all in the form of questions. Here are the main ones: