premise: Barry has only visited Ukraine, Samuel has only visited Finland, Lee has only visited Iraq, Tracy has only visited Romania, Eddie has only visited Liechtenstein, Max has only visited Côte D'ivore, Louis has only visited Saint Kitts & Nevis, Armando has only visited Nepal, Joel has only visited Libya, Curtis has only visited Norway, Guy has only visited El Salvador
hypothesis: Ross didn't visit Côte D'ivore