
When I was in college I liked to go for early morning walks. One day I was walking by some sheet-metal buildings on campus, when I happened to look up and notice an ornament at the apex of each roof. The construction company—Morton—had installed a weather vane, embellished with their company name, on each of their buildings. However, when I compared the three weather vanes on three nearby buildings that breezy winter morning, I noticed that they were each pointing in a different direction.