premise: Howard has only visited Bosnia & Herzegovinia, Lance has only visited Ecuador, Robert has only visited Bolivia, Carl has only visited Lesotho, Larry has only visited Marshall Islands, Ken has only visited Slovakia, Tracy has only visited Sri Lanka, Willard has only visited Liberia, Thomas has only visited Italy, Raymond has only visited India, Jack has only visited Uganda, Ian has only visited France
hypothesis: Howard didn't visit Bosnia & Herzegovinia