Jack Lew, nominated for treasury secretary, uses a series of loops as his signature. Which is fine for him personally, but may appear odd on U.S. currency. President Barack Obama said Lew &amp;quot;assures me that he is going to work to make at least one letter legible in order not to debase our currency.&quot; Examining Lew's signature, some experts theorized that he might be hiding something or that he was &quot;the cuddly sort.&quot; Let's get beyond speculation and put 10 facts into ink: