From: tristan.wibberley+netnews2@alumni.manchester.ac.uk   
      
   On 22/01/2026 08:30, Mikko wrote:   
      
   > I don't any web site that I could trust to meet your   
   > requirement.However, as far as I know, all authors agree about its meaning   
   > for ordinary logic.   
      
   Essentially boolean, with undefinedness when either argument is   
   undefined and no notion that it's true when exactly one argument "has no   
   content" and no notion that it has no content when both arguments have none?   
      
   Those, I think, are the consequences of being defined entirely by the   
   typical 4 row truth table.   
      
      
   --   
   Tristan Wibberley   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)