Anchor: A jockey with a red helmet is riding a white horse, and a jockey with an orange helmet is riding a brown horse.
Entailed: there are at least two horses.
Contradiction: The jockeys are riding donkeys.
Contradiction: The man from Berkeley is joining the army.
Contradiction: If you don't want to sail, then take the harbor cruise.
Contradiction: The woman is swimming in the ocean.
Contradiction: Both general and application controls are needed over computer systems.