We never write short books.  In fact, we probably write 25-50% more than you see.  But our kindler, gentler editors at Wiley trim this down so that it fits better on a shelf.  But in the process a lot of great stuff gets cut.  This chapter in particular lost a lot of content so we are posting the original submission here.  Warning:  This is pre-editing, so if you find a typo, well, you're on your own!