How do you know?

[muxbule]

Originally Posted by Nevadaref

This is exactly why it is important to switch on all fouls in the 2-man system.

If the crew doesn't, then we end up with one official being primarily on one end of the court judging the defense by one of the teams and the partner doing the same at the other end.

This was my immediate thought when I read the OP. I would only add that when you feel like there has not been a switch in some time it is good to force one so you aren't caught seeing the game as Nevadaref states.