6 – The general form of truth-function is: [p, E, N(E)]. This is the general form of proposition.
6.1 – The propositions of logic are tautologies.
6.2 – Mathematics is a logical method. The propositions of mathematics are equations, and therefore pseudo-propositions.
6.3 – Logical research means the investigation of all regularity. And outside logic all is accident.
6.4 – All propositions are of equal value.
6.5 – For an answer which cannot be expressed the question too cannot be expressed. The riddle does not exist. If a question can be put at all, then it can also be answered.
From the Tractatus Logico-Philosophicus, statements 6.0-6.5 (link to Laventhol’s online edition).