But there is method behind the madness! The referee and the assistant referee (AR) will make 99% of the decisions between them-given the level of the game, this is to be expected. Only if they are undecided will the Additional Assistant Referee (AAR) be consulted, and then only if he is judged to have had a good view of the incident
However, if a wrong decision is reached and the AAR has had the best view and can (credibly!) step in then his input would be necessary. They are qualified referees so can judge incidents as well as his colleagues. The most important thing is to reach the correct decision-even if it looks a bit messy and takes time.
AARs can, if necessary, come on to the pitch to assist. The puzzling thing is that they are now on the AR's side of the goal whereas they were on the other side when they started the experiment two years ago