Fiona is big. Fiona is high. Dave is little. Dave is thin. Alan is quiet. Charlie is poor. Charlie is bad. If someone is not huge then they are poor. If someone is not rough then they are nice. If someone is quiet then they are wealthy. If someone is wealthy and not dull then they are kind. If someone is poor and not huge then they are sad. If someone is little and thin then they are dull. If someone is dull and not wealthy then they are bad. All nice people are smart. 
Charlie is not smart.