​ 
  Use of logical props.. You may have one so complicated that you cannot, by looking at it, see that it is a tautology; but you have shewn that it can be derived by certain operations from
certain other props. wh. according to our rule for constructing tautologies
props. of wh. this is obvious
; & hence you are enabled to see that one thing follows from another, when you would not have been able to see it otherwise. E.g. if our tautology is of form p ⊃ q, you can see that q follows from p; & so on.


 

(2015–) Wittgenstein Source Bergen Nachlass Edition (WS-BNE). Edited by the Wittgenstein Archives at the University of Bergen under the direction of Alois Pichler. In: Wittgenstein Source, curated by Alois Pichler (2009–) and Joseph Wang-Kathrein (2020–). (N) Bergen: WAB.



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