While playing our usual, who can stack the plastic toy dinosaurs the highest with my son? And most of the time being defeated due to his special technique of putting two Diplodocuses back to back to give his stack some extra height. I decide to pull out my ace and made a great stack equally matching his double Diplodocus by using a large sized Dimetrodon. But was told, that’s cheating dad Dimetrodon is not a true Dinosaur. Is he right?