Read the text and determine if the sentence is true:

HOUSTON Nov 18 The Federal Reserve's newest policymaker, Rob Kaplan, on Wednesday declined to say whether he will support an interest rate rise in December. "If and when" the Fed does raise rates, it will do so very gradually, he said. (Reporting by Ann Saphir; Editing by Chizu Nomiyama)

Sentence: Rates can only be lowered.