premise: Terry has only visited New Zealand, Dan has only visited Malta, Francisco has only visited Luxembourg, Duane has only visited Marshall Islands, Randy has only visited Gambia, Bernard has only visited Central African Republic, Harvey has only visited Tuvalu, Pedro has only visited Madagascar, Terrence has only visited Djibouti, Fred has only visited Moldova, Russell has only visited Peru, Alexander has only visited Brunei
hypothesis: Alexander didn't visit Brunei