Charlie is furry. Dave is furry. Dave is quiet. Dave is smart. Fiona is rough. Fiona is white. Harry is cold. Harry is furry. Harry is quiet. Harry is rough. All quiet, rough things are cold. All quiet, furry things are cold. All young things are smart. All rough things are quiet. White, furry things are young. Young, furry things are quiet. If something is cold then it is furry.
Fiona is not smart.