Erin is cold. Erin is red. Erin is rough. Erin is round. Fiona is blue. Fiona is cold. Fiona is quiet. Fiona is red. Fiona is rough. Fiona is young. Harry is blue. Harry is red. Harry is rough. Harry is round. Harry is young. If something is young then it is red. All young things are cold. If Harry is rough then Harry is quiet. All blue, cold things are red. If Fiona is quiet then Fiona is young. If Harry is cold then Harry is round.
Erin is not young.