Bob is red. Dave is cold. Dave is quiet. Erin is cold. Erin is furry. Erin is quiet. Harry is blue. Red people are furry. If someone is furry and young then they are quiet. If someone is furry and young then they are cold. If someone is quiet and red then they are round. Furry people are quiet. If Dave is blue and Dave is cold then Dave is quiet. All round people are young.
Erin is blue.