Bob is big. Bob is blue. Bob is young. Charlie is big. Charlie is not blue. Charlie is furry. Charlie is not nice. Charlie is rough. Dave is not blue. Dave is kind. Dave is nice. Dave is young. Furry, big people are not kind. If someone is blue and not kind then they are furry. Nice, rough people are blue. If someone is big and not rough then they are blue. Blue, rough people are furry. If someone is nice and not big then they are not blue.
Dave is not big.