Answer by  
                                                                                          JYas (68)
                                                            
                          
                          
                                                           That make's sense to me.  That is what happened in professional tennis.  If a player challenges a call, everyone views the the same video tape, then the appropriate call is made.  I would think this type of system would solve the problem.  Generally, it is very difficult to make a bad call if everyone is watching the same video.