When you go shopping for jewelry, you walk into the store amidst acres of glass showcase. Streamline showcases flow on both your sides and jewelry sparkles and shimmers. The showcase on your left is gold plated, and looks like it could be about as valuable as what’s inside. The glass is polished and you can see your reflection looking up at you from the emeralds and rubies within. On your right is a tall showcase that holds necklaces, huge diamond clad necklaces, with each level improving in size and quality upon the last, and at the top, a museum worthy piece that must be out of your price range.

A sales person approaches you, bids you good day, and asks what you have in mind. You reply, and he leads you over to a jewelry showcase towards the middle of the store. Slowly, he bends down, slides the mirrored door in the showcase, and extracts two spectacular rings that make you feel embarrassed about having to ask the price of before you can continue. “Not to worry,” he reassures you, “these rings are on sale, and are within your price range.” It turns out he’s right, miraculously, and he leads you farther on into the land of the showcase to gift wrap your wife’s new ring.