Haha! My colleague "tested" me on this a while back: "Can you join 9 dots using no more than 4 strokes and without lifting your pen from the paper?" I thought it was so simple - I simply drew a curved line through all the dots. Didn't even need 4 strokes.
As I go through The Idea Book today, it seems the author agrees that this is an out-of-the-box thinking :) And of course, this solution is a rule breaker (Read page 160 - 165). Yes! I'm psyched. I guess more by the rule-breaking than the out-of-the-box thinking :)
