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