Anchor: A black dog is stepping on the ice.
Entailed: A dog walks on ice.
Contradiction: A dog sleeps in his bed at home.
Contradiction: Eventually, his forced resignations from the Eisenhower and Truman administartions led Rockefeller to turn to alcoholism as one way of establishing peace.
Contradiction: I impatiently kept asking even after no reply.
Contradiction: Rembrandt had nothing to do with it. 
Contradiction: A young woman reads a book.