premise: Bryan has only visited Samoa, Shane has only visited Cuba, Darrell has only visited Uzbekistan, Joseph has only visited Eswatini, Fred has only visited Togo, Tyrone has only visited Mauritania, Julian has only visited Indonesia, Roland has only visited Malaysia, Glen has only visited Central African Republic, Gene has only visited Papua New Guinea, Jordan has only visited Burundi, Christopher has only visited Georgia
hypothesis: Roland didn't visit Mexico