premise: Sam has only visited Seychelles, Douglas has only visited The Bahamas, Jeremy has only visited Serbia, Ivan has only visited São Tomé & Prícipe, Rodney has only visited South Korea, Darren has only visited Thailand, Leroy has only visited Mauritius, Lester has only visited North Korea, Jimmy has only visited Samoa, Marshall has only visited Luxembourg, Brett has only visited Singapore, Reginald has only visited Libya
hypothesis: Gerald didn't visit Libya