premise: Jeremy has only visited Cyprus, Fred has only visited Uzbekistan, Brett has only visited Comoros, Chad has only visited Bhutan, Henry has only visited Eswatini, Larry has only visited Chad, Gerald has only visited São Tomé & Prícipe, Derek has only visited Costa Rica, Francisco has only visited Turkmenistan, Dustin has only visited Bangladesh
hypothesis: Gerald didn't visit São Tomé & Prícipe