premise: Dan has only visited Slovakia, Alan has only visited Ecuador, Cory has only visited Senegal, Tyrone has only visited Bahrain, Lonnie has only visited El Salvador, Bernard has only visited India, Salvador has only visited Bangladesh, Leroy has only visited Suriname, Cody has only visited Dominican Republic, Ben has only visited Switzerland, Francisco has only visited Chad, Jaime has only visited Djibouti
hypothesis: Joseph didn't visit Dominican Republic