Anne is furry. Anne is quiet. Anne is round. Anne is smart. Anne is white. Anne is young. Dave is furry. Dave is quiet. Dave is not round. Dave is not smart. Fiona is round. Fiona is white. All round people are furry. If someone is young and round then they are furry. If Fiona is white and Fiona is quiet then Fiona is young. Big, furry people are white. Quiet people are big. If someone is young and not big then they are round. If someone is not white and not big then they are round. If someone is not round then they are not young.
Fiona is young.