premise: Carl has only visited Turkmenistan, Alex has only visited Mongolia, Lance has only visited Liberia, Felix has only visited Cabo, Derek has only visited Israel, Jason has only visited Haiti, Ricky has only visited Moldova, Fernando has only visited New Zealand, Randy has only visited Suriname, Guy has only visited Vietnam, Ryan has only visited Kiribati, Ronnie has only visited Romania
hypothesis: Lance didn't visit Liberia