All entities have a purpose—a reason to exist. To better understand and manage "things" we define them and classify them. It could be a job description, a contract or even a country. I remember as a kid working with my father on a home improvement project. As I was about to attempt to hit a nail in with the back of a screwdriver my Dad said "Stop! You don't use a screwdriver for that. Use the hammer." It certainly looked to me like the screwdriver would have done a perfectly adequate job of hitting in that nail. My father explained that each tool had a purpose, something for which it was designed and for which it was best. So what was wrong with using the screwdriver? Simple. It may have worked that one time. Maybe even a few more. But in the long run it was not a good bet to effectively hit in nails and, what's more, would likely cause damage to the screwdriver. What we had here was a case of scope creep. I was extending the definition and function of the screwdriver beyond it's