premise: Dwayne has only visited Mozambique, Jay has only visited Pakistan, Elmer has only visited Denmark, Victor has only visited Saint Lucia, Gregory has only visited Saint Vincent & the Grenadines, Ricardo has only visited Liechtenstein, Kent has only visited São Tomé & Prícipe, Roy has only visited Sri Lanka, Nathan has only visited Colombia, Frederick has only visited Saint Kitts & Nevis, Joseph has only visited Croatia
hypothesis: Dwayne didn't visit Paraguay