Three, top notch, professional, basketball, officials, and nobody saw the ball not go in?
I shouldn't be too hard on these guys. A few years ago, in two person game, as the trail, I had a foul from behind against a player in the act of shooting, in the lane. My partner, the lead, also had a whistle a split second after mine, and the foul resulted in crash, and a lot of bodies lying in the lane area. In the time it took me to figure out who was going to report the foul, (my partner), and if anybody was seriously hurt on the floor (they were not), I failed to observe if the ball went in the hoop, as did my partner. We had to ask the crew at the table if the ball went in (it did).