premise: George has only visited Australia, Ray has only visited Jamaica, Milton has only visited São Tomé & Prícipe, Bob has only visited San Mmarino, Enrique has only visited Tajikistan, Marvin has only visited Tunisia, Willie has only visited Sweden, Victor has only visited Guinea, Samuel has only visited Palau, Matthew has only visited Pakistan, Duane has only visited Cameroon
hypothesis: Samuel didn't visit Côte D'ivore