Bob is quiet. Bob is red. Charlie is blue. Charlie is smart. Erin is blue. Erin is round. Fiona is rough. All blue, quiet people are round. Round, rough people are red. Round people are rough. Quiet people are blue. If someone is not smart then they are quiet. All red people are not smart. If Charlie is furry and Charlie is not blue then Charlie is not quiet.
Fiona is not furry.