Anchor: They performed a very vital function for me.
Entailed: The purpose they served was very important for me.
Contradiction: The function they performed for me was insignificant.
Contradiction: SO2 emissions cannot drop below 10% their allowable levels.
Contradiction: The altar of St. Ignatius Loyola covers the tomb of the Jesuit's Spanish founder.
Contradiction: The man is walking toward the bus.
Contradiction: The dog is brown.