premise: Dean has only visited Bosnia & Herzegovinia, Harvey has only visited Guatemala, Tommy has only visited Jordan, Edgar has only visited Angola, Kent has only visited Philippines, Vernon has only visited Suriname, Bruce has only visited Saudi Arabia, Eric has only visited Timor-Leste, Bob has only visited Costa Rica, Gordon has only visited Namibia, Erik has only visited South Korea
hypothesis: Vernon didn't visit Saint Vincent & the Grenadines