n'est pas

There's no 13th floor in our building, as in many buildings, and therefore no 13th floor button on the elevator. But, if you visit the service elevator there is a button for the 13th floor. Way up at the top. Above the button for the 21st floor, which is nothing but giant air-conditioning units. It's a mystery, one I was going to solve until I learned that it's impossible to get that button to light up. Ok, mystery stopped in it's tracks. But someday when I get around to it I will solve it. It's kind of a pain in the ass to get to the service elevator. I mean, you have to use your access card and everything.