Fiona is huge. Fiona is big. Dave is short. Dave is thin. Charlie is clever. Alan is rough. Alan is poor. If someone is not strong then they are rough. If someone is not dull then they are wealthy. If someone is clever then they are nice. If someone is nice and not sad then they are quiet. If someone is rough and not strong then they are bad. All bad people are tiny. If someone is short and thin then they are sad. If someone is sad and not nice then they are poor. If someone is poor then they are young. If someone is wealthy then they are kind. All kind people are smart. All quiet people are old. 
Alan is not smart.