Bob is big. Bob is strong. Gary is little. Gary is small. Charlie is nice. Fiona is bad. Fiona is dull. If someone is not huge then they are bad. If someone is not sad then they are quiet. If someone is nice then they are kind. If someone is kind and not poor then they are wealthy. If someone is bad and not huge then they are rough. If someone is little and small then they are poor. If someone is poor and not kind then they are dull. All quiet people are smart. 
Bob is not rough.