As a kid, I was absolutely enamored of those books of "brain teasers" that had to be solved by drawing tables and marking off the little "yes" and "no" boxes. You know the type: if the marathon has five racers, and the one in the yellow shoes didn't finish fifth, and the one in the purple shoes was the one whose name… » 7/27/12 9:00am 7/27/12 9:00am