premise: Calvin has only visited Sierra Leone, Craig has only visited Yemen, Jacob has only visited Romania, Everett has only visited Libya, Edgar has only visited Laos, Armando has only visited Guinea-Bissau, Cecil has only visited Antigua & Barbuda, Aaron has only visited Fiji, Kenneth has only visited Denmark, Paul has only visited New Zealand, Shawn has only visited Azerbaijan
hypothesis: Cecil didn't visit Antigua & Barbuda