Alan is high. Alan is huge. Fiona is small. Fiona is thin. Dave is nice. Gary is poor. Gary is sad. If someone is not strong then they are poor. If someone is not bad then they are kind. If someone is nice then they are wealthy. If someone is wealthy and not rough then they are smart. If someone is poor and not strong then they are dull. All dull people are little. If someone is small and thin then they are rough. If someone is rough and not wealthy then they are sad. If someone is sad then they are young. If someone is kind then they are quiet. All quiet people are clever. All smart people are old. 
Dave is not old.