Extract from Ken Schawber, Project Management with scrum, 2004:

“Common sense is a combination of experience, training, humility, wit, and intelligence. People employing Scrum apply common sense every time they find the work is veering off the path leading to the desired results. Yet most of us are so used to using prescriptive processes—those that say “do this, then do that, and then do this”—that we have learned to disregard our common sense and instead await instructions.”