Anchor: Dave turned his head weakly.
Entailed: Dave wasn't turning his head in a strong manner.
Contradiction: Dave shook his foot wildly. 
Contradiction: A reporter has an obligation to protect his ham sandwich. 
Contradiction: They cannot reasonably quantify the impact of the rule.
Contradiction: The Y2K bug was so insignificant that people did not even bother commenting on it. 
Contradiction: Susan moved her head up and down.