es not actually contain its sense,
but does contain the possibility of expressing it. ('The content of
a proposition' means the content of a proposition that has sense.) A
proposition contains the form, but not the content, of its sense.

3.14 What constitutes a propositional sign is that in its elements (the
words) stand in a determinate relation to one another. A propositional
sign is a fact.

3.141 A proposition is not a blend of words.(Just as a theme in music is
not a blend of notes.) A proposition is articulate.

3.142 Only facts can express a sense, a set of names cannot.

3.143 Although a propositional sign is a fact, this is obscured by
the usual form of expression in writing or print. For in a printed
proposition, for example, no essential difference is apparent between a
propositional sign and a word. (That is what made it possible for Frege
to call a proposition a composite name.)

3.1431 The essence of a propositional sign is very clearly seen if we
imagine one composed of spatial objects (such as tables, chairs, and
books) instead of written signs.

3.1432 Instead of, 'The complex sign "aRb" says that a stands to b in
the relation R' we ought to put, 'That "a" stands to "b" in a certain
relation says that aRb.'

3.144 Situations can be described but not given names.

3.2 In a proposition a thought can be expressed in such a way that
elements of the propositional sign correspond to the objects of the
thought.

3.201 I call such elements 'simple signs', and such a proposition
'complete analysed'.

3.202 The simple signs employed in propositions are called names.

3.203 A name means an object. The object is its meaning. ('A' is the
same sign as 'A'.)

3.21 The configuration of objects in a situation corresponds to the
configuration of simple signs in the propositional sign.

3.221 Objects can only be named. Signs are their representatives. I can
only speak about them: I cannot put them into words. Propositions can
only say how things are, not what they are.

3.23 The requirement that simple signs be possible is the requirement
that sense be determinate.

3.24 A proposition about a complex stands in an internal relation to a
proposition about a constituent of the complex. A complex can be given
only by its description, which will be right or wrong. A proposition
that mentions a complex will not be nonsensical, if the complex does
not exits, but simply false. Whe