Bob is furry. Bob is green. Bob is nice. Bob is quiet. Bob is round. Bob is young. Harry is big. Harry is furry. Harry is green. Harry is nice. Harry is round. Harry is young. If something is green and quiet then it is round. All furry, young things are quiet. All green things are quiet. All furry things are quiet. If something is green and quiet then it is young. Furry things are big.
Bob is not furry.