The nature of propositions and the cognitive value of names have been the focal point of philosophy of language for the last few decades. The advocates of the causal reference theory have favored the view that the semantic contents of proper names　are their referents. However, Frege’s puzzle about the different cognitive value of coreferential names has made this identification seem impossible. Geirsson provides a detailed overview of the debate to date, and then develops a novel account that explains our reluctance, even when we know about the relevant identity, to substitute...