premise: Allen has only visited São Tomé & Prícipe, Ricardo has only visited Equatorial Guinea, Raymond has only visited Syria, Gregory has only visited Moldova, Gabriel has only visited Ecuador, Hector has only visited Latvia, Francisco has only visited South Korea, Jimmy has only visited Ireland, Oscar has only visited Netherlands, Maurice has only visited China, Felix has only visited Palau
hypothesis: Hector didn't visit Saint Vincent & the Grenadines