Anchor: But there are several pharmacological and social differences that reduce the relevance of rat research to social policy.
Entailed: Social differences may have a negative impact on how relevant rat research is to social policy. 
Contradiction: Social differences among rats increase the relevance of rat research. 
Contradiction: Bears competed for Chinese food.
Contradiction: The United States is polling data for who owns a PC or personal computer.
Contradiction: A man holding dumbbells in gym
Contradiction: People believe this is one of the ways to be happy.