Charlie is big. Erin is young. Fiona is rough. Gary is nice. Gary is rough. Gary is smart. Gary is young. Rough people are quiet. If Gary is young then Gary is big. Big, furry people are rough. If Gary is furry then Gary is quiet. All nice, quiet people are big. Nice people are rough. If someone is smart and nice then they are big. All young, big people are smart.
Fiona is not quiet.