Erin is cold. Erin is furry. Erin is green. Erin is not rough. Erin is smart. Erin is not young. Fiona is furry. Fiona is rough. Fiona is smart. Fiona is young. Gary is blue. Gary is furry. If Erin is young then Erin is green. If someone is green and not rough then they are not young. All blue, smart people are not rough. Cold, smart people are not rough. If someone is not young and not rough then they are green. If someone is smart and not cold then they are furry.
Erin is smart.