I aced a basic logic class in college that covered both sentential and predicate logic.  I am interested in furthering my skills in symbolic logic, but I don't know how.  My school doesn't offer any upper-level logic courses.  I'm thinking I would like to buy a simple textbook for a more in-depth study of the more advanced concepts (I've heard the term "modal logic" thrown around, but I don't know what that is).  Can you suggest a good text or author I should investigate?        
                  
    
  
  
      Read another response by Peter Smith, Richard Heck
          






