Full Idea
Evans argues that there can be rigid designators that are meaningful even if empty.
Gist of Idea
Rigid designators can be meaningful even if empty
Source
report of Gareth Evans (Reference and Contingency [1979]) by Penelope Mackie - How Things Might Have Been 1.8
Book Reference
Mackie,Penelope: 'How Things Might Have Been' [OUP 2006], p.16