Dave is not blue. If someone is not furry and not blue then they are not rough. If someone is furry and not blue then they are not red. Kind people are not red. If Dave is red and Dave is not blue then Dave is rough. If Dave is blue and Dave is not nice then Dave is not rough. If Dave is rough then Dave is not kind. If Dave is nice and Dave is round then Dave is not rough. If someone is kind and not round then they are not nice.
Dave is not blue.