Top-down and bottom-up

Convergent and divergent problems

 * 1) "Convergent problems" are related to "top-down".
 * 2) E.g. slowly converging toward the point you are working to.
 * 3) Divergent problems are related to bottom-up.
 * 4) Online poker is an example of bottom-up sorting.
 * 5) Sorting a bookshelf is mostly top-down.