premise: Alberto has only visited Samoa, Darren has only visited Switzerland, Elmer has only visited Laos, Samuel has only visited Republic of the Congo, Wayne has only visited Canada, Byron has only visited Colombia, Glenn has only visited Brunei, Reginald has only visited United Kingdom, Clifford has only visited Italy, Scott has only visited Monaco, Hector has only visited Liechtenstein
hypothesis: Clifford didn't visit Spain