My girls and I were reading this yesterday. And while it wasn't the main topic of our reading, it is the part that has stayed with me.

What I am wondering is how do they come up with this and how do we track a line of those five people who lead us to the 6th person?

Does someone five or so people from me know the King of England's private number? (I would liked to have said Queen, but since she is not around...). 

If I am fifth in line to someone else's connections, I know I don't have that number.

Would love to hear your thoughts.