What Do Proper Names Refer to? The Simple Sentence Puzzle and Identity Statements

The purpose of this paper is to solve the simple sentence puzzle about proper names. (1) Superman leaps more tall buildings than Clark Kent. (2) Superman = Clark Kent. (3) Superman leaps more tall buildings than Superman. Even when (1) and (2) are true, (3) is false. It will be shown that this is not a real puzzle, because (i) (1) and (3) do not express singular propositions, and (ii) the identity statement in (2) only concerns singular propositions. In (1) and (3), the proper names refer to aspects of an individual at the level of explicature, while identity statements of the form X = Y mean that Y can be substituted for X salva veritate, only in singular propositions about X /Y. Given this difference in reference between (1)/(3) and (2), the conjunction of (1) and (2) does not entail (3), in accordance with our intuition.