You're either trolling or the hardest-headed person in existence. And I'm really not sure which. http://www.nature.com/scientificamerican/journal/v20/n1/images/scientificamericanmind0510-56sp-I8.jpg Look at the picture on the left. Is it a closed, intact triangle? If you think so, look at the picture on the right. It's the same structure, but viewed from a different angle. Knowing that, look back at the picture on the left. Do you still think it's a closed, intact triangle? PERTH!!!