Anchor: The white and brown-spotted dog is walking through shallow water.
Entailed: A dog is walking through water.
Contradiction: The dog is walking in the house.
Contradiction: The bus the boy is on is really a space ship.
Contradiction: The Communists were disappointed that Blum didn't support their goals.
Contradiction: Two boys are playing baseball.
Contradiction: If lack of maintenance could cause an item to break down to the point of being useless or need replacement, it is assumed to fall into the class of critical maintenance.