All poor countries have had plague epidemics, and all democratic countries have never had plague epidemics, so all democratic countries are not poor countries. Which is similar to the above inference structure:. ['All animals are creatures, all creatures are selective, so all animals are selective.', 'All corruption is a crime, all Changji people are not criminals, so all corruption criminals are not Changji people.', 'All lies are not true, and the truth is true, so all truth is not a lie.', 'All vegetables are nutritious and all clover is not nutritious, so those who eat clover are undernourished.']