The bear needs the cat. The cat eats the dog. The dog needs the cat. If someone eats the cat and the cat needs the bear then they need the bear. If someone likes the bear and the bear likes the cat then they are nice. If someone eats the cat then the cat needs the bear. If someone needs the dog then they need the bear. If someone eats the dog then they need the dog. If someone likes the bear then the bear needs the dog.
The cat needs the bear.
@0: The bear needs the cat.[(triple1)] The cat eats the dog.[(triple2)] The dog needs the cat.[(triple3)] @1: The cat needs the dog.[(((triple2) -> rule5))] @2: The cat needs the bear.[(((((triple2) -> rule5)) -> rule4))]