sicp-ex-4.59



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meteorgan

  
  
 (a) (meeting ?dept (Friday . ?t)) 
 (b)  
 (rule (meeting-time ?person ?day-and-time) 
          (and (job ?person (?dept . ?r)) 
                  (or (meeting ?dept ?day-and-time) 
                  (meeting the-whole-company ?day-and-time)))) 
 (c) 
 (and (meeting-time (Hacker Alyssa P) (Wednesday . ?time)) 
          (meeting ?dept (Wednesday . ?time)))