Erin is nice. Erin is white. Erin is young. If someone is smart and not young then they are nice. If someone is blue and smart then they are rough. If someone is quiet and smart then they are not rough. Nice people are smart. If Erin is smart and Erin is not rough then Erin is quiet. If Erin is not blue and Erin is not quiet then Erin is not white.
Erin is not smart.