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6.1

The propositions of logic are tautologies.

6.11

The propositions of logic therefore say nothing. (They are the analytical propositions.)

6.12

The fact that the propositions of logic are tautologies shows the formal -- logical -- properties of language, of the world.

That its constituent parts connected together in this way give a tautology characterizes the logic of its constituent parts.

In order that propositions connected together in a definite way may give a tautology they must have definite properties of structure. That they give a tautology when so connected shows therefore that they possess these properties of structure.

6.13

Logic is not a theory but a reflexion of the world.

Logic is transcendental.