Bob is big. Bob is white. Bob is young. Dave is big. Dave is furry. Erin is white. Harry is white. If Erin is white and Erin is furry then Erin is green. Green people are round. All big, quiet people are furry. All young people are quiet. If someone is furry and not white then they are young. White people are big. If someone is big then they are young. If someone is round and not white then they are quiet. If Erin is not young and Erin is not quiet then Erin is round.
Erin is not white.