premise: Wallace has only visited Iran, Clifton has only visited Marshall Islands, Ron has only visited Togo, Ramon has only visited Egypt, Ernest has only visited Oman, Max has only visited Romania, Reginald has only visited Montenegro, Bruce has only visited Jordan, Sean has only visited Bosnia & Herzegovinia, Tyrone has only visited Czech Republic, Albert has only visited Cameroon, Ronald has only visited Bahrain
hypothesis: Ernest didn't visit Oman