5.555 Clearly we have some concept of elementary propositions quite apart
from their particular logical forms. But when there is a system by which we
can create symbols, the system is what is important for logic and not the
individual symbols. And anyway, is it really possible that in logic I
should have to deal with forms that I can invent? What I have to deal with
must be that which makes it possible for me to invent them.


5.556 There cannot be a hierarchy of the forms of elementary propositions.
We can foresee only what we ourselves construct.


5.5561 Empirical reality is limited by the totality of objects. The limit
also makes itself manifest in the totality of elementary propositions.
Hierarchies are and must be independent of reality.


5.5562 If we know on purely logical grounds that there must be elementary
propositions, then everyone who understands propositions in their C form
must know It.


5.5563 In fact, all the propositions of our everyday language, just as they
stand, are in perfect logical order.--That utterly simple thing, which we
have to formulate here, is not a likeness of the truth, but the truth
itself in its entirety. (Our problems are not abstract, but perhaps the
most concrete that there are.)


5.557 The application of logic decides what elementary propositions there