Bob is blue. Dave is green. Dave is rough. Erin is cold. Erin is green. Erin is quiet. Harry is green. If Dave is quiet then Dave is cold. If someone is rough then they are green. All cold people are rough. If someone is blue then they are rough. Green, blue people are round. All furry, blue people are quiet. Round people are furry. If someone is furry and rough then they are quiet.
Harry is not blue.