premise: Vincent has only visited Saint Vincent & the Grenadines, Jon has only visited Croatia, Billy has only visited Serbia, Christian has only visited Egypt, Sean has only visited Malaysia, Tracy has only visited Netherlands, Stanley has only visited Iran, Clyde has only visited Comoros, Raymond has only visited Senegal, Alvin has only visited Greece, Gilbert has only visited Malta, Cody has only visited India
hypothesis: Edward didn't visit Senegal