premise: Kyle has only visited Haiti, Ralph has only visited Peru, Scott has only visited Suriname, Roy has only visited Democratic Republic of the Congo, Milton has only visited Canada, Harold has only visited Spain, Randy has only visited Luxembourg, Daryl has only visited Timor-Leste, Peter has only visited São Tomé & Prícipe, Vincent has only visited San Mmarino, Mike has only visited Botswana
hypothesis: Ralph didn't visit Peru