Anchor: Two hikers with backpacks crossing a snow field.
Entailed: The hikers are wearing their backpacks in the snow.
Contradiction: Two hickers climb to a mountain top on a beautiful summer day.
Contradiction: Nobody has a jacket
Contradiction: Two fencers collide.
Contradiction: There is ISDN and ADSL offered on your block.
Contradiction: An infant chews on a toy.