Bob is not furry. Bob is green. Bob is quiet. Bob is round. Bob is not white. Bob is young. Dave is green. Dave is quiet. Dave is round. Dave is smart. Dave is not white. Dave is young. If Bob is furry and Bob is not smart then Bob is white. If someone is young then they are green. If someone is not smart and not quiet then they are not green. All young, quiet people are round. If someone is young then they are not furry. If Dave is not white and Dave is not green then Dave is not quiet.
Dave is furry.