Charlie is nice. Charlie is rough. Dave is nice. Erin is cold. Erin is smart. Fiona is quiet. Fiona is rough. If Erin is smart and Erin is quiet then Erin is not big. If someone is cold and rough then they are big. All blue people are quiet. If Erin is big then Erin is blue. Quiet people are smart. If someone is rough then they are blue. If someone is blue and smart then they are cold.
Charlie is blue.