Bob is not blue. Bob is not furry. Bob is quiet. Bob is rough. Fiona is not blue. Fiona is furry. Fiona is quiet. Fiona is red. Fiona is rough. Fiona is not white. Fiona is young. Harry is furry. Harry is red. Harry is rough. Harry is not young. If Harry is not red and Harry is not white then Harry is young. If something is furry and quiet then it is rough. If something is young then it is rough.
Bob is not red.