In the Prototractatus Wittgenstein wrote an additional section (called 6.55) which is seen as a possible third solution to the matter of building a perfect system of logic.
This conclusion was similar to that provided by Russell in his introduction to the Tractatus, i.e. admitting a hierarchization of languages speaking about each other (which is, in turn, a prefiguration of Tarsky's difference between language and metalanguage, as well as an application of Russell's theory of type to the field of language).
In the Tractatus this metalinguistic solution is eliminated because, according to its syntax and semantics, I only have one logic, one language, therefore all propositions are the same (for the same reason the possibility of having an infinite number of languages is eliminated as well).
With regard to this observations, I wonder ->
- in which sense in the Tractatus "Philosophy never ends"?
(Firstly, I cannot grasp in which sense this assumption is connected with the observations above; secondly, I wonder if there are other additional explanations which justify it)