Bob is not furry. Bob is rough. Bob is not young. Charlie is green. Charlie is smart. Harry is not green. Harry is rough. Harry is smart. Harry is white. Harry is young. All furry, smart things are green. If something is smart and not furry then it is rough. If Charlie is young then Charlie is not furry. If something is furry then it is not smart. If Bob is quiet then Bob is rough. All furry things are smart. All green, rough things are not white. If something is green and not furry then it is not young.
Bob is quiet.