As a relative newcomer to soccer, I am having trouble with the offsides rule. How is a linesman supposed to watch not only offensive player "A" who may or may not be offsides, but also another offensive player "B" who may be 50+ yards away, who may or may not pass the ball to offsides player "A"? If, as I suspect, this is often an impossible task, there are bound to be many incorrect calls made. Am I missing something here? How does the soccer world reconcile this?