Cull Pattern (True, False, False)
Design Pattern: Selector. Select members of a collection that have specified properties.
Def: https://docs.google.com/file/d/0Bxe--rofiU7fZmM1NUxPLUlqM28/edit?usp=sharing
Design Patterns: http://www.designpatterns.ca/view.php?hash=&dir=files%2FPatterns%2FProjection









