  A third type of theory for ‘rich’ is an invariantist theory with unarticulated constituents (Perry 2000, Chapter 10). On such views, ‘rich’ is a binary predicate whose content in all contexts is the previously mentioned binary relation rich for, but the word is never accompanied by a hidden indexical. Thus the content of the sentence ‘George is rich’, in all contexts, is less than fully propositional. However, according to some views of this sort, a speaker who utters that sentence typically asserts a full proposition, such as the proposition that George is rich for a philosopher. For discussion, see Bach 1994, 2005.