He doesn't say that the Fed doesn't set the nominal rate in the short term. As I understood it, the post argues that it's unsustainable for the Fed to attempt

He doesn't say that the Fed doesn't set the nominal rate in the short term. As I understood it, the post argues that it's unsustainable for the Fed to attempt to set the nominal short-term rate to something different than the medium-term real rate, over which it has no control. Did you skip the whole part about what happens if the Fed sets the nominal short-term rate lower or higher than the medium-term real rate?