Anchor: A precondition to risk assessment is the establishment of clear, consistent agency objectives.
Entailed: Clear and consistent agency objectives are a precondition to risk assessment. 
Contradiction: Consistent agency objectives aren't important in risk assessment. 
Contradiction: a girl plays with a basketball
Contradiction: A group of people jumping into a pool.
Contradiction: You are asking them to remember it forever. 
Contradiction: People are racing on motorcycles.