Anchor: Only one system of government has ever dealt adequately with the incentive problem for the chief executive, and that's hereditary monarchy.
Entailed: Only a hereditary monarchy has appropriately addressed the competition for chief executive. 
Contradiction: Hereditary Monarchies have not addressed the issue of competition for chief executive. 
Contradiction: the girls are at home sleeping
Contradiction: Shadow can't travel yet so I need to stay.
Contradiction: Mrs. Vandemeyer didn't drink anything. 
Contradiction: A man is practicing martial arts.