It makes my job very enjoyable. I think you do the best job with two people. So if you are really going for it four groups of two people are really good. You sit there and discuss things. The horse is being judged on what you can see.
Some people can see the left leg and the others can see the right leg.
And if overall the judges are in unison then the best horse wins. The winners won because they had the highest average between all four opinions. Everybody thought they were good. They take everybody s score and average them. With the two judging system you can always say what did you think about that first jump.