Anchor: A man with a cane and a boy are walking on a sidewalk.
Entailed: The side walk is used for walking by a man.
Contradiction: The sidewalk is not paved.
Contradiction: the dog swam in the pond
Contradiction: The snow is dry and not very slushy.  
Contradiction: Absolutely none of them are receiving supplemental incomes
Contradiction: A man is holding a box.