​ 
  Russell doesn't really wish to say that two classes are similar if they are correlated. He needs a correlation which isn't a grossly material one, which in fact is the possibility of a material correlation. And that means that when he says A & B are 1-1 corr. it really means they can be, or it makes sense to say that they are.
    So we are driven to consider cases in which it makes sense & such in which it makes no sense to say that
91
two classes are 1-1 correlated.
    What is the condition of their being 1-1 correlatable.

 

(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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