Anchor: The racism that kept Alabama's constitution unchanged has hardly been eradicated.
Entailed: Racism is at least part of the reason Alabama's constitution remains unchanged.
Contradiction: Racism is the reason why the state of Alabama changed its constitution. 
Contradiction: Poirot gave up on the case and left.
Contradiction: Three people walked into a house.
Contradiction: The skateboarder standing and waiting to use a half pipe.
Contradiction: A car is standing around with some people.