premise: Kurt has only visited Saint Vincent & the Grenadines, Dennis has only visited Mali, Terrence has only visited Kazakhstan, Floyd has only visited Azerbaijan, Lonnie has only visited Burkina, Sean has only visited Niger, Reginald has only visited Kenya, Philip has only visited Ghana, Adrian has only visited Turkey, Rene has only visited Eritrea, Herbert has only visited South Sudan, Louis has only visited El Salvador
hypothesis: Louis didn't visit El Salvador