Uniqueness, 4, 7, 15, 23, 25, 26, 27, 32, 34, 35-36, 40, 45, 56, 68, 69, 72, 77, 111 Value, 6, 16, 17, 18, 30, 39, 46-48, 54, 56-57, 69, 71, 77, 79, 85, 97, 98, 104, 105