Anchor: If the tide comes in, the man's tennis shoes will get wet.
Entailed: The man is wearing a tennis shoe
Contradiction: There is no tide, a man will get his shoes wet
Contradiction: The man is next to a small pond.
Contradiction: the man is waring tennis shoes and is near the shore.
Contradiction: The earth has no moon, therefore no tides to speak of
Contradiction: The man is in the dessert.