Full Idea
We need an account of what makes an expression into a name for something that will allow names to change their denotations.
Gist of Idea
How can an expression be a name, if names can change their denotation?
Source
Gareth Evans (The Causal Theory of Names [1973], §II)
Book Reference
Evans,Gareth: 'Collected Papers' [OUP 1985], p.14
A Reaction
Presumably an example would be 'The Prime Minister is in the building'. Evans proposes to discuss communication, rather than strict meanings and descriptions.