The dog needs the tiger. The tiger eats the dog. The tiger needs the dog. If someone needs the tiger and they eat the tiger then they need the dog. If someone needs the dog and the dog is green then they do not chase the tiger. If someone chases the dog then they chase the tiger. If someone eats the dog and the dog is green then they do not need the dog. If the tiger is kind and the tiger does not need the dog then the dog eats the tiger. If the dog is cold and someone does not need the dog then they need the tiger.
The dog does not need the tiger.