Anchor: Either behavior is self-reinforcing from one year to the next.
Entailed: Two behaviors are self-reinforcing every year. 
Contradiction: None of the behaviors are self-reinforcing. 
Contradiction: A cat is running down a dark alley.
Contradiction: USA Today posed a third version of the article.
Contradiction: the woman videotapes the brids
Contradiction: There are some beaches with sand at Georgieupolis.