There is an interesting kind of a puzzle / challenge where a set of objects is presented that follows some certain rule. The rule can be arbitrary -- these obje

There is an interesting kind of a puzzle / challenge where a set of objects is presented that follows some certain rule. The rule can be arbitrary -- these objects are all circles, these objects are in the top portion of the box, these objects are pictures of cats, etc. The objective is to identify the rule in the set given, that does not fit any of the objects in another set (also given) . I can't recall or be able to find the name of this kind of puzzle, though! Edit: They are called Bongard problems. http://www.foundalis.com/res/diss_research.html http://www.foundalis.com/res/diss_research.html