Bob is quiet. Erin is green. Fiona is quiet. Harry is furry. Quiet, cold things are furry. If something is cold and blue then it is red. All rough, green things are blue. If Fiona is furry and Fiona is not green then Fiona is quiet. Furry things are not green. If something is quiet then it is cold. If something is not furry then it is not quiet. If something is green and not furry then it is blue.
Fiona is not rough.