Dave is round. Fiona is green. Gary is big. If someone is furry and blue then they are round. All green people are white. Blue people are quiet. All big, round people are not blue. If someone is blue and white then they are big. White people are blue. If Dave is quiet and Dave is not blue then Dave is not furry. If Dave is big and Dave is not blue then Dave is white.
Fiona is white.