Bob is not big. Bob is blue. Bob is green. Bob is nice. Bob is not quiet. Bob is white. Bob is young. Fiona is big. Fiona is blue. Fiona is not green. Fiona is not nice. Fiona is quiet. Fiona is white. Fiona is young. If someone is quiet and white then they are blue. If Fiona is quiet then Fiona is white. If someone is big and not white then they are blue.
Fiona is not young.