premise: Terrance has only visited North Korea, Rodney has only visited Sudan, Kirk has only visited Papua New Guinea, Ben has only visited Botswana, Larry has only visited São Tomé & Prícipe, Seth has only visited Liberia, Nathan has only visited Belarus, Gerald has only visited Uruguay, Norman has only visited Albania, Derek has only visited Saint Vincent & the Grenadines, Joseph has only visited Netherlands
hypothesis: Seth didn't visit Central African Republic