premise: Clifton has only visited Albania, Alfred has only visited Czech Republic, Harold has only visited Pakistan, Rene has only visited Djibouti, Gabriel has only visited Tonga, Peter has only visited Nauru, Todd has only visited Kazakhstan, Bill has only visited Botswana, Byron has only visited Saint Lucia, Tony has only visited Philippines, Andy has only visited Kiribati
hypothesis: Byron didn't visit Saint Kitts & Nevis