I'm sure Bill will be by later today to clear it up for you. Dude can smell which bolt you're talking about. He knows its chemical composition and how many threads it has. He knows which plant made it, and where the raw materials were mined. He once met the guy that designed the bolt and the guy bought Bill's drink. He has a shadow box containing that bolt on a wall in his garage, to match his silk boxers printed with the serial number of it.