Bob is big. Bob is kind. Bob is rough. Fiona is big. Fiona is kind. Fiona is smart. Gary is furry. Gary is young. Harry is big. Harry is furry. All young, green things are furry. All rough, kind things are green. If something is big and furry then it is young. All rough, young things are kind. If Gary is green and Gary is smart then Gary is big. If something is big and green then it is young.
Bob is not young.