Dave is big. Dave is huge. Bob is tiny. Bob is little. Fiona is clever. Harry is rough. Harry is poor. If someone is not strong then they are rough. If someone is not bad then they are quiet. If someone is clever then they are kind. If someone is kind and not sad then they are smart. If someone is rough and not strong then they are dull. If someone is dull then they are small. All small people are thin. If someone is tiny and little then they are sad. If someone is sad and not kind then they are poor. If someone is poor then they are energetic. If someone is energetic then they are young. If someone is quiet then they are wealthy. If someone is wealthy then they are nice. All nice people are kind. If someone is smart then they are experienced. All experienced people are old.
Dave is not thin.