President Volodymyr Zelensky has dismissed being introduced as “President Putin” by his U.S. counterpart Joe Biden earlier this week, describing it as a “mistake.” Biden made the gaffe during his speech on the final day of the NATO summit on July 11, as questions over his fitness for office continue to swirl. “And now I want to turn it over to the president of Ukraine, who has as much courage as he has determination. Ladies and gentleman, President Putin,” Biden said. Speaking on July 13 during a press conference during a brief visit to Ireland, Zelensky played down the incident. “It’s a mista…