a type of identificational information packaging in which two referents that the hearer assumed were different individuals are asserted to be, in fact, one and the same individual; and the construction that expresses that information packaging. Example: in The Morning Star is the Evening Star, it is asserted that two celestial objects that were once thought to be distinct objects (and given distinct names) are one and the same, namely the planet Venus. (Section 10.1.2)