The bear eats the mouse. The bear is big. The bear is green. The bear is kind. The bear is rough. The mouse eats the bear. The mouse is green. If something is red and rough then it eats the mouse. If something needs the mouse and the mouse is green then the mouse needs the bear. If something eats the mouse and the mouse eats the bear then it needs the mouse. If something likes the mouse then the mouse needs the bear. If something is red and it likes the bear then it needs the mouse. If the bear likes the mouse then the bear eats the mouse.
The bear does not need the mouse.