Bob is furry. Bob is quiet. Bob is red. Bob is not round. Charlie is green. Erin is furry. Erin is quiet. Erin is red. Erin is not rough. Erin is young. Gary is not red. Gary is rough. If someone is furry then they are green. If someone is not quiet and not round then they are young. Round people are not rough.
Erin is quiet.