5.5
Every truth-function is a result of the successive application of the operation (−−−−−T) (ξ, … . .) to elementary propositions. This operation denies all the propositions in the right-hand bracket and I call it the negation of these propositions.
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- 5.51 If ξ has only one value, then N(ξ)=~p (not p), if it has two values then N (ξ)=~p.~q (neither p nor…
- 5.52 If the values of ξ are the total values of a function fx for all values of x, then N(ξ)=~(∃x).fx.
- 5.53 Identity of the object I express by identity of the sign and not by means of a sign of identity.…
- 5.54 In the general propositional form, propositions occur in a proposition only as bases of the…
- 5.55 We must now answer a priori the question as to all possible forms of the elementary propositions.…