Full Idea
It does have to be acknowledged, I think, that every statement whatever is such that there is no one meaning which any sentence used to assert it must have.
Gist of Idea
For any statement, there is no one meaning which any sentence asserting it must have
Source
Richard Cartwright (Propositions [1962], 11)
Book Reference
Cartwright,Richard: 'Philosophical Essays' [MIT 1987], p.46
A Reaction
This feels to me like a Gricean move - that what we are really interested in is communicating one mental state to another mental state, and there are all sorts of tools that can do that one job.