Dave is big. Dave is blue. Dave is furry. Dave is nice. Dave is round. Dave is smart. Dave is young. If Dave is nice and Dave is young then Dave is furry. If Dave is round and Dave is blue then Dave is smart. Smart, round people are blue. If someone is nice then they are smart. All smart people are nice. If someone is big and furry then they are young. Furry people are nice. All blue, furry people are big.
Dave is not furry.