think of the sense of the proposition.


3.12 I call the sign with which we express a thought a propositional
sign.And a proposition is a propositional sign in its projective relation
to the world.


3.13 A proposition, therefore, does 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