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