Bob is quiet. Bob is smart. Charlie is big. Charlie is round. Charlie is not white. Dave is round. Harry is white. If someone is quiet then they are big. If someone is smart and not quiet then they are blue. If someone is smart and round then they are blue. If Dave is quiet then Dave is big. If Bob is quiet then Bob is blue. If someone is round and not big then they are blue. If Dave is white and Dave is not big then Dave is young. If someone is blue and not young then they are round.
Charlie is blue.