A proposition can be true or false only in virtue of being a picture of reality.
propositional sign, applied and thought out, is a thought
Every sign that has a definition signifies via the signs that serve to define it
A proposition that mentions a complex will not be nonsensical, if the complex does not exits, but simply false.
Propositions can only say how things are, not what they are.
A name means an object. The object is its meaning. ('A' is the same sign as 'A'.)
The simple signs employed in propositions are called names.
Only facts can express a sense, a set of names cannot.
A proposition is not a blend of words.(Just as a theme in music is not a blend of notes.) A proposition is articulate.
A propositional sign is a fact.