Bob is not furry. Dave is not big. Dave is furry. Dave is not white. Dave is young. Erin is not blue. Erin is not cold. Erin is rough. Erin is not young. Fiona is big. Young, cold people are furry. If someone is furry then they are blue. White people are young. If someone is cold and not rough then they are furry. White, furry people are young. All blue, rough people are not big. If someone is cold and not young then they are furry. If someone is furry and not blue then they are not young.
Erin is not furry.