premise: Paul has only visited Argentina, Antonio has only visited Trinidad & Tobago, Patrick has only visited San Mmarino, Jeremy has only visited Nauru, Christopher has only visited Qatar, Tommy has only visited Dominican Republic, Isaac has only visited Venezuela, Stephen has only visited Timor-Leste, Jim has only visited Burundi, Nelson has only visited Eritrea, Peter has only visited Armenia, Ralph has only visited Vanuatu
hypothesis: Tyrone didn't visit Eritrea