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