Keelefilosoofia raamat
What they have in com-
mon is solely that they bear the expressing relation to the same proposition.
So too for ambiguity. A sentence S is ambiguous if and only if there are at
least two distinct propositions P1 and P2 , and the single expression S bears
the expressing relation to each of P1 and P2. In the case of merely verbal
disputes, we can say that the parties do not disagree over any proposition;
they are merely using different forms of words to express the same proposi-
tion, and the particular forms of words look as though they are in conflict
even though they are not.
We know some positive things about what propositions are supposed to
be, besides their being expressed by sentences. They are identifiable in terms
of "that" clauses: we speak of the proposition that snow is white, and dedicate
ourselves to the proposition that all men [sic] are created equal. "Snow is
white," "La neige est blanche" and "Der Schnee ist weiss" are synonymous
annaabi.ee 
