Erin is nice. Erin is not rough. Erin is young. Fiona is blue. Fiona is nice. Gary is blue. Gary is not rough. If something is nice then it is not cold. If Gary is nice and Gary is cold then Gary is young. If something is rough then it is cold. All green things are young. If something is blue then it is quiet. If something is not rough then it is nice. If something is rough and not nice then it is cold. If something is not cold then it is quiet.
Erin is not green.