premise: Ricardo has only visited Vanuatu, Ronnie has only visited Guyana, Don has only visited Vatican City, Arnold has only visited Lesotho, Jeffrey has only visited Haiti, Brad has only visited São Tomé & Prícipe, Gilbert has only visited North Korea, William has only visited Malta, Wesley has only visited Finland, Duane has only visited El Salvador, Joe has only visited Mozambique, Carl has only visited Australia
hypothesis: Gilbert didn't visit Chile