In the proposition a state of affairs is, as it were, put together for the sake of experiment.
One can say, instead of, This proposition has such and such a sense, This proposition represents such and such a state of affairs.
4.0311 One name stands for one thing, and another for another thing, and they are connected together. And so the whole, like a living picture, presents the atomic fact.
4.0312 The possibility of propositions is based upon the principle of the representation of objects by signs.
My fundamental thought is that the "logical constants" do not represent. That the logic of the facts cannot be represented.