premise: Armando has only visited Sierra Leone, Russell has only visited Norway, Mario has only visited Vanuatu, Marshall has only visited Federated States of Micronesia, Jared has only visited Sweden, Daryl has only visited Cameroon, Arthur has only visited Yemen, Brett has only visited Ukraine, Edwin has only visited Uganda, Samuel has only visited Kiribati, Lonnie has only visited Jordan, Elmer has only visited The Bahamas
hypothesis: Ramon didn't visit Yemen