Anchor: I may have lost some of youth's sharpness, and I may be stranded in an alien world, but I am no fool.
Entailed: Even if I did lose a bit of youth's sharpness and even if I am stuck in an alien world, I still am not a fool. 
Contradiction: I'm a fool because I am stuck in this alien world. 
Contradiction: The hockey goalie missed blocking the shot from the other team.
Contradiction: A woman is sweeping the floor.
Contradiction: Female vendors are selling meat
Contradiction: There is snow under the dogs' feet.