premise: Lester has only visited Uganda, Dwayne has only visited Italy, Jeffery has only visited Uruguay, Shane has only visited Portugal, Kurt has only visited Djibouti, Theodore has only visited Belgium, Wade has only visited Singapore, Maurice has only visited Algeria, Sergio has only visited Palestine, Jerry has only visited Belize, Terrence has only visited Somalia, Calvin has only visited Luxembourg
hypothesis: Dwayne didn't visit Sierra Leone