Anchor: Concerns about the reliability of value estimates from CV studies arose because research has shown that bias can be introduced easily into these studies if they are not carefully conducted.
Entailed: If research is not carefully conducted, bias can be introduced.  
Contradiction: If research is carefully conducted, bias will be introduced.  
Contradiction: Hodges was not put in jail by the Rebels.
Contradiction: They are on the ski lift.
Contradiction: The prospect of future troubles rang too loudly to ignore, even when currently faced with a different issue.
Contradiction: Something has upset me.