No two snowflakes are alike. To Gizmo, my new lifelong friend, these three, similar, green, tennis balls aren’t the same either. I tested the french bulldog to see which ball he gravitated to most. It was an ambitious experiment (in mind), but could have been executed more effectively if I marked the tennis balls to get more specific results. Even Newton had his shortcomings. That aside, it’s a funny display of Gizzy’s mind at work.