{Derivation of 20 questions} "Is it bigger than a breadbox?" On family vacations, we'd play this guessing game in the car as Dad drove us to another terrific tourist trap (or terrifying, depending on your point of view). Resulting from a study focused on how our brain processes and retrieves acquired data, this game learns more the more you play. The mysterious mechanism (our mind) may never be fully understood; we might as well have fun with it.