Bob is furry. Bob is nice. Bob is not red. Bob is not rough. Bob is white. Fiona is furry. Fiona is not nice. Gary is big. Gary is blue. Gary is furry. Gary is nice. Gary is red. If someone is rough and not red then they are big. If someone is furry and white then they are big. Nice people are big. If someone is big and not rough then they are white. If someone is blue and not furry then they are nice. Red people are nice. If someone is not rough then they are big. If someone is not furry and not white then they are not blue.
Bob is not blue.