Bob is white. Dave is young. Erin is young. Fiona is white. If something is red and not white then it is quiet. If something is white and not rough then it is not blue. If something is quiet and not red then it is furry. If Fiona is not rough then Fiona is quiet. If Dave is red and Dave is rough then Dave is furry. If something is blue and not quiet then it is furry.
Fiona is not white.