Since we can probably agree that you&#x27;re not indexing distances or other units of measurement (you can make a piece of string of length sprt(2) centimeters or other irrational lengths!), let&#x27;s skip the terminology argument. That wasn&#x27;t my point.<p>Is skipping the 13th floor a US thing? I don&#x27;t recall ever seeing it in the UK or Germany.