Bob is big. Bob is round. Charlie is round. Dave is big. Dave is cold. Dave is rough. Dave is young. Fiona is cold. Fiona is rough. Fiona is young. Rough people are blue. If someone is white then they are round. Round people are young. If someone is round and blue then they are white. Young, round people are cold. If someone is young and big then they are rough. All blue, young people are rough. All round, rough people are blue. Young people are big.
Charlie is not young.