premise: Frank has only visited Montenegro, Christopher has only visited Solomon Islands, Micheal has only visited Benin, Everett has only visited Lesotho, Martin has only visited Luxembourg, Michael has only visited Samoa, Sam has only visited Finland, Ramon has only visited Mauritius, Daryl has only visited Nepal, Claude has only visited Morocco, Gerald has only visited Guinea-Bissau, Clayton has only visited Tuvalu
hypothesis: Ramon didn't visit Bolivia