Anchor: There are people on the sidewalk.
Entailed: There are people outdoors.
Contradiction: The apocolypse is happening, and noone is outside.
Contradiction: You can't hire boats for sailing in the Mediterranean.
Contradiction: Eating the feces in this river would have a bad effect on your health.
Contradiction: Nobody has an umbrella.
Contradiction: A child is sucking a pacifier plays with his toy.