Anchor: High scorers on mental tests do bunch up (as Herrnstein and Murray put it) in elite-university student bodies.
Entailed: People who score high on mental tests naturally navigate towards each other in colleges. 
Contradiction: High scorers on mental tests are anti-social. 
Contradiction: one girl alone inside her house.
Contradiction: A person shows off a skateboard trick.
Contradiction: Adrin ran his hand under the unicorn's belly and could feel how cold it was. 
Contradiction: There is a task force to study service areas.