Anchor: It was so old that Red's father couldn't tell Red when it had been built.
Entailed: Even Red's father didn't know how old it was.
Contradiction: Red's father knew when it was built.
Contradiction: Sex will always be for procreation, cloning and genetic engineering does not exist. 
Contradiction: A gateway on the right side of David Street leads to the Cardo.
Contradiction: A boy is playing in the sand.
Contradiction: A man is walking by the wall.