

Propositions are truthfunctions of elementary propositions. (An elementary proposition is a truthfunction of itself.) 5.1 (01+5) The truthfunctions can be ordered in series. That is the foundation of the theory of probability. 5.2 (5) The structures of propositions stand to one another in internal relations. 5.3 (2) All propositions are results of truthoperations on the elementary propositions. The truthoperation is the way in which a truthfunction arises from elementary propositions. According to the nature of truthoperations, in the same way as out of elementary propositions arise their truthfunctions, from truthfunctions arises a new one. Every truthoperation creates from truthfunctions of elementary propositions, another truthfunction of elementary propositions i.e. a proposition. The result of every truthoperation on the results of truthoperations on elementary propositions is also the result of one truthoperation on elementary propositions. Every proposition is the result of truthoperations on elementary propositions. 5.4 (7) Here it becomes clear that there are no such things as 'logical objects' or 'logical constants' (in the sense of Frege and Russell). 5.5 (03+5) Every truthfunction is a result of the successive application of the operation (    T) (,....) to elementary propositions. This operation denies all the propositions in the righthand bracket and I call it the negation of these propositions. 5.6 (4) The limits of my language mean the limits of my world. 