XPost: sci.math   
   From: tristan.wibberley+netnews2@alumni.manchester.ac.uk   
      
   On 18/01/2026 01:20, Richard Damon wrote:   
      
   > 1 + 1 = 2 IS true   
      
   is true today, not at all times. There was a time when it was   
   meaningless scribble.   
      
   Also you can formulate PA' in which 1 + 1 = 8, 1 + 8 = 3, 1 + 3 = 6 and   
   so forth. of PA', 1 + 1 = 2 is not an elementary theorem.   
      
   --   
   Tristan Wibberley   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)