a + (b + (x + d)) = (a + (b + x)) + d = ((a + b) + x) + d = (a + b) + (x + d)

a + (b + ((x + d) + d)) = (a + (b + (x + d))) + d = ((a + b) + (x + d)) + d = (a + b) + ((x + d) + d)

Das ist ein Stück der Spirale aus der Mitte heraus.
     x hält den Platz offen für das, was erst bei der Entwicklung entsteht.

(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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