A good analogy is the process an airline pilot goes through before take-off and landing. They go through a “check list” to be sure they are not leaving anything to “chance” or memory. When we consider which is more complicated: the airplane or the human body? But where do we use a checklist? Do we want to go to a hospital where we don’t use a check list to be sure everything we do, those routine things that we know work, aren’t being used.