Bob is rough. Dave is green. Erin is kind. If Bob is rough and Bob is not kind then Bob is young. If someone is not kind then they are blue. If someone is cold then they are green. All kind people are quiet. If someone is not kind then they are green. If someone is not blue then they are rough. If someone is blue and not rough then they are young. If someone is green and not rough then they are cold.
Dave is not green.