Bob is big. Bob is quiet. Dave is big. Dave is blue. Dave is furry. Dave is quiet. Dave is round. Fiona is big. Fiona is quiet. Fiona is red. Gary is big. Gary is blue. Gary is not furry. Gary is red. Gary is rough. If something is red and furry then it is not big. If something is not round then it is blue. If something is rough and big then it is quiet. If something is quiet and not furry then it is rough. If something is rough and not furry then it is red. If Dave is blue and Dave is red then Dave is not quiet.
Fiona is round.