Dave is big. Fiona is big. Fiona is cold. Gary is furry. Gary is smart. Gary is not white. Harry is white. If someone is big then they are white. If someone is cold and white then they are rough. All cold, rough people are quiet. Cold, white people are rough. If Fiona is quiet then Fiona is smart. If someone is rough and smart then they are furry. If Dave is big then Dave is cold. If someone is rough and not white then they are quiet. If someone is cold and not white then they are rough.
Fiona is not smart.