Anchor: A child standing, surrounded by bikes.
Entailed: A kid stands next to bikes.
Contradiction: A kid steals a bike.
Contradiction: You can be almost certain that all ancient coins or artifacts are genuine. 
Contradiction: If she bragged about knowing so much, he would have had some doubts.
Contradiction: We do not have enough information to modernize the Clean Air Act.
Contradiction: I can do it if you need me to.