Dave is big. Dave is blue. Dave is furry. Dave is quiet. Dave is red. Dave is round. Dave is white. Erin is not quiet. Gary is not blue. Gary is quiet. Gary is not white. Harry is blue. Harry is not furry. Harry is quiet. Harry is red. If someone is blue and not quiet then they are big. If someone is not furry then they are big. Round, furry people are big. All red, white people are round. If someone is not quiet and not furry then they are white. If Dave is red and Dave is not big then Dave is not white.
Dave is not blue.