Bob is blue. Bob is cold. Bob is quiet. Bob is rough. Bob is young. Erin is cold. Erin is quiet. Harry is rough. Harry is smart. Harry is young. All smart things are nice. If something is nice then it is quiet. If something is nice then it is blue. Smart things are cold. If Harry is blue and Harry is young then Harry is rough. If something is cold then it is blue.
Erin is not young.