From: gah4@u.washington.edu   
      
   On Tuesday, September 12, 2023 at 10:42:28 AM UTC-7, Andy wrote:   
      
   (the subject not included in the message)   
      
   > How detect grammar not derive nonterminals ?   
      
   Ethernet uses the spanning tree protocol to detect loops in a switched network.   
      
   I think the same idea works here, but didn't try it.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)