premise: Freddie has only visited The Bahamas, David has only visited Russia, Rodney has only visited Solomon Islands, Dennis has only visited Belgium, Bobby has only visited Yemen, Angel has only visited Nauru, Darrell has only visited Ukraine, Alan has only visited Mali, Gordon has only visited Guinea-Bissau, Roberto has only visited Ecuador, Donald has only visited Mexico, Christian has only visited Seychelles
hypothesis: Dan didn't visit Seychelles