San Francisco Fed President John Williams believes deeply that monetary policy is data-dependent, so much so that he has printed the mantra on T-shirts that he is giving away coast to coast. On Friday at Chapman University in Orange, Calif., however, he didn’t discuss the current state of U.S. economic data or the stance of monetary policy. Instead, he focused on why forcing the Fed to follow a strict monetary policy rule to make interest rate decisions would be, well, a problem (http://reut.rs/1bmCfvB). It’s a view that a number of his colleagues, including Fed Chair Janet Yellen, have publicly embraced. Monetary policy — it’s independent. Sounds like something you could put on a T-shirt.