Dakota tribal wisdom says that when you discover you are riding a dead horse, the best strategy is to dismount.
I found this page that describes this old saying and (if you follow the link) gives a few stupid examples of what businesses today do when they discover that they are in fact riding smelly one.
Cant help wondering how many people are currently riding a dead horse, and knows it. one can always say that there is fair risk that a software project fail, but thinking back on projects and friends projects, there is a surprisingly large number of riders who have been on dead horses and knew it was dead.
What about your project, is that a dead horse.....