Doing better than the person before you for the bettering of both of you.
John makes two sandwiches with just bread, lunch meat, and cheese. One for him and one for Bob. They were pretty plain not so tasty sandwiches. Bob takes the same sandwiches and adds lettuce, tomato, mayo, and bacon. Bob and John now have two very tasty sandwiches.
Bob did a better job then john and bettered both of them in doing so.
Dubblies