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       Strictly speaking, it is incorrect to say: We understand the proposition p when we know that ‘“p” is true’ ≡ p; for this would naturally always be the case if accidentally the propositions to right & left of the symbol “ ≡ ” were both true or both false. We require not only an equivalence, but a formal equivalence, which is bound up with the introduction of the form of p.
 

(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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