The bald eagle is blue. The cat chases the cow. The cat is blue. The cat is not green. The cow needs the rabbit. The cow sees the cat. The rabbit needs the bald eagle. If something does not see the cat and the cat does not see the cow then the cat does not need the cow. If something needs the rabbit and it chases the cat then it needs the cow. If something chases the rabbit and it chases the bald eagle then it does not see the bald eagle.
The cow does not need the cow.