Bob is blue. Bob is furry. Bob is green. Bob is kind. Bob is quiet. Bob is round. Bob is young. Dave is kind. Dave is quiet. Dave is round. Fiona is young. Gary is green. Gary is kind. Gary is round. Gary is young. If Dave is green then Dave is furry. All green, quiet people are round. Furry, young people are kind. Round, furry people are quiet. All kind, round people are furry. All round, furry people are young. If Fiona is kind then Fiona is green. If someone is quiet and round then they are blue.
Dave is not quiet.