Charlie is furry. Charlie is quiet. Charlie is rough. Charlie is young. Dave is not blue. Dave is not cold. Dave is furry. Dave is quiet. Dave is rough. Dave is smart. Dave is young. Erin is young. Harry is cold. Harry is quiet. Harry is rough. Harry is smart. All young things are furry. All smart things are young. If Erin is quiet and Erin is not young then Erin is rough.
Harry is not furry.