premise: Perry has only visited Malta, Jared has only visited Turkmenistan, Barry has only visited Republic of the Congo, Francis has only visited Trinidad & Tobago, Jeremy has only visited Belarus, Ben has only visited Yemen, Clifton has only visited Mauritius, Salvador has only visited Uruguay, Wallace has only visited Tanzania, Kirk has only visited Cameroon, Tracy has only visited Singapore, Alvin has only visited Israel
hypothesis: Salvador didn't visit Uruguay