A proposition […] is not to be understood as the lingual expression of a judgment. It is, on the contrary, that sign of which the judgment is one replica and the lingual expression another. But a judgment is distinctly more than the mere mental replica of a proposition. It not merely expresses the proposition, but it goes further and accepts it.
http://www.commens.org/dictionary/entry/quote-new-elements-kaina-stoiceia-36